[llvm] [PassBuilder] Add ThinLTO EP callbacks mirroring FullLinkTimeOptimizationEarly/Last (PR #221857)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-x86_64-debian-dylib` running on `gribozavr4` while building `llvm` at step 7 "test-build-unified-tree-check-llvm".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/60/builds/8184

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

```
Step 7 (test-build-unified-tree-check-llvm) failure: 1200 seconds without output running [b'ninja', b'check-llvm'], attempting to kill
...
PASS: LLVM :: Analysis/CostModel/AArch64/arith-fp.ll (183 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/arith-overflow.ll (184 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/cmp.ll (185 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/cost-scalable-vector-gep.ll (186 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/ctlz.ll (187 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/ctpop.ll (188 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/fminmax.ll (189 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/fp-conversions-odd-vector-types.ll (190 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/fshl.ll (191 of 70099)
PASS: LLVM :: Analysis/CostModel/AArch64/fshr.ll (192 of 70099)
command timed out: 1200 seconds without output running [b'ninja', b'check-llvm'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1276.854757

```

</details>

https://github.com/llvm/llvm-project/pull/221857