[llvm] [DebugInfo][RemoveDIs] Remove some debug intrinsic-only codepaths (PR #143451)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `mlir-nvidia-gcc7` running on `mlir-nvidia` while building `llvm` at step 7 "test-build-check-mlir-build-only-check-mlir".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/116/builds/14002

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

```
Step 7 (test-build-check-mlir-build-only-check-mlir) failure: test (failure)
******************** TEST 'MLIR :: Target/LLVMIR/omptarget-debug-var-1.mlir' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 1
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/bin/mlir-translate -mlir-to-llvmir /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/mlir/test/Target/LLVMIR/omptarget-debug-var-1.mlir | /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/bin/FileCheck /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/mlir/test/Target/LLVMIR/omptarget-debug-var-1.mlir
# executed command: /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/bin/mlir-translate -mlir-to-llvmir /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/mlir/test/Target/LLVMIR/omptarget-debug-var-1.mlir
# .---command stderr------------
# | mlir-translate: /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/IR/BasicBlock.cpp:63: void llvm::BasicBlock::convertToNewDbgValues(): Assertion `!I.DebugMarker && "DebugMarker already set on old-format instrs?"' failed.
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
# | Stack dump:
# | 0.	Program arguments: /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/bin/mlir-translate -mlir-to-llvmir /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/mlir/test/Target/LLVMIR/omptarget-debug-var-1.mlir
# | Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
# | 0  mlir-translate 0x00005ca19c635feb
# | 1  mlir-translate 0x00005ca19c633194
# | 2  libc.so.6      0x00007820ece57520
# | 3  libc.so.6      0x00007820eceab9fc pthread_kill + 300
# | 4  libc.so.6      0x00007820ece57476 raise + 22
# | 5  libc.so.6      0x00007820ece3d7f3 abort + 211
# | 6  libc.so.6      0x00007820ece3d71b
# | 7  libc.so.6      0x00007820ece4ee96
# | 8  mlir-translate 0x00005ca19dd51efa
# | 9  mlir-translate 0x00005ca19ddc9fce
# | 10 mlir-translate 0x00005ca19ccc4dc2
# | 11 mlir-translate 0x00005ca19cc9810b
# | 12 mlir-translate 0x00005ca19c78ca39
# | 13 mlir-translate 0x00005ca19c618d2d
# | 14 mlir-translate 0x00005ca19c6190ed
# | 15 mlir-translate 0x00005ca19c7a6b3f
# | 16 mlir-translate 0x00005ca19c619da4
# | 17 mlir-translate 0x00005ca19c616fa1
# | 18 libc.so.6      0x00007820ece3ed90
# | 19 libc.so.6      0x00007820ece3ee40 __libc_start_main + 128
# | 20 mlir-translate 0x00005ca19c616e75
# `-----------------------------
# error: command failed with exit status: -6
# executed command: /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/bin/FileCheck /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/mlir/test/Target/LLVMIR/omptarget-debug-var-1.mlir
# .---command stderr------------
# | FileCheck error: '<stdin>' is empty.
# | FileCheck command line:  /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/bin/FileCheck /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/mlir/test/Target/LLVMIR/omptarget-debug-var-1.mlir
# `-----------------------------
# error: command failed with exit status: 2

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/143451