[llvm] [MIR2Vec][llvm-ir2vec] Add MIR2Vec support to llvm-ir2vec tool (PR #164025)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-ppc64le-linux` running on `ppc64le-sanitizer` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/72/builds/15585

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure) (timed out)
...
PASS: SanitizerCommon-asan-powerpc64le-Linux :: Linux/signal_segv_handler.cpp (5029 of 5038)
PASS: SanitizerCommon-msan-powerpc64le-Linux :: Linux/signal_segv_handler.cpp (5030 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Dynamic-Test/40/96 (5031 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Test/40/96 (5032 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/40/96 (5033 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Test/40/96 (5034 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Test/68/96 (5035 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Test/68/96 (5036 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Dynamic-Test/68/96 (5037 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/68/96 (5038 of 5038)
command timed out: 1800 seconds without output running [b'python', b'../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=6324.552459
Step 12 (test compiler-rt default) failure: test compiler-rt default (failure)
...
PASS: UBSan-AddressSanitizer-powerpc64le :: TestCases/ImplicitConversion/unsigned-integer-truncation-ignorelist.c (4994 of 5038)
PASS: UBSan-Standalone-powerpc64le :: TestCases/ImplicitConversion/unsigned-integer-truncation-ignorelist.c (4995 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/ImplicitConversion/integer-arithmetic-value-change.c (4996 of 5038)
PASS: ScudoStandalone-Unit :: ./ScudoUnitTest-powerpc64le-Test/97/333 (4997 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/ImplicitConversion/signed-integer-truncation.c (4998 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/ImplicitConversion/bitfield-conversion.c (4999 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/ImplicitConversion/integer-conversion.c (5000 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/70/96 (5001 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/TypeCheck/vptr.cpp (5002 of 5038)
PASS: ThreadSanitizer-powerpc64le :: signal_thread.cpp (5003 of 5038)
PASS: UBSan-MemorySanitizer-powerpc64le :: TestCases/ImplicitConversion/unsigned-integer-truncation-ignorelist.c (5004 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/Pointer/nullptr-and-nonzero-offset-variable.cpp (5005 of 5038)
PASS: ThreadSanitizer-powerpc64le :: deadlock_detector_stress_test.cpp (5006 of 5038)
PASS: UBSan-MemorySanitizer-powerpc64le :: TestCases/ImplicitConversion/signed-integer-truncation-ignorelist.c (5007 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/ImplicitConversion/signed-integer-truncation-or-sign-change-ignorelist.c (5008 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/ImplicitConversion/signed-integer-truncation-ignorelist.c (5009 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Dynamic-Test/67/96 (5010 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Test/66/96 (5011 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Test/66/96 (5012 of 5038)
PASS: UBSan-ThreadSanitizer-powerpc64le :: TestCases/ImplicitConversion/unsigned-integer-truncation-ignorelist.c (5013 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Test/67/96 (5014 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Test/67/96 (5015 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/66/96 (5016 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/67/96 (5017 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Dynamic-Test/66/96 (5018 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/32/96 (5019 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Test/32/96 (5020 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Test/32/96 (5021 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Dynamic-Test/32/96 (5022 of 5038)
PASS: ThreadSanitizer-powerpc64le :: Linux/fork_multithreaded4.cpp (5023 of 5038)
PASS: ThreadSanitizer-powerpc64le :: bench_threads.cpp (5024 of 5038)
PASS: ThreadSanitizer-powerpc64le :: restore_stack.cpp (5025 of 5038)
PASS: SanitizerCommon-ubsan-powerpc64le-Linux :: Linux/signal_segv_handler.cpp (5026 of 5038)
PASS: SanitizerCommon-lsan-powerpc64le-Linux :: Linux/signal_segv_handler.cpp (5027 of 5038)
PASS: SanitizerCommon-tsan-powerpc64le-Linux :: Linux/signal_segv_handler.cpp (5028 of 5038)
PASS: SanitizerCommon-asan-powerpc64le-Linux :: Linux/signal_segv_handler.cpp (5029 of 5038)
PASS: SanitizerCommon-msan-powerpc64le-Linux :: Linux/signal_segv_handler.cpp (5030 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Dynamic-Test/40/96 (5031 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Test/40/96 (5032 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/40/96 (5033 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Test/40/96 (5034 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Test/68/96 (5035 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Test/68/96 (5036 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-calls-Dynamic-Test/68/96 (5037 of 5038)
PASS: AddressSanitizer-Unit :: ./Asan-powerpc64le-inline-Dynamic-Test/68/96 (5038 of 5038)

command timed out: 1800 seconds without output running [b'python', b'../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=6324.552459

```

</details>

https://github.com/llvm/llvm-project/pull/164025