[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 `flang-arm64-windows-msvc` running on `linaro-armv8-windows-msvc-01` while building `llvm` at step 6 "test-build-unified-tree-check-mlir".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/207/builds/2393

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

```
Step 6 (test-build-unified-tree-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
c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\mlir-translate.exe -mlir-to-llvmir C:\Users\tcwg\llvm-worker\flang-arm64-windows-msvc\llvm-project\mlir\test\Target\LLVMIR\omptarget-debug-var-1.mlir | c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\filecheck.exe C:\Users\tcwg\llvm-worker\flang-arm64-windows-msvc\llvm-project\mlir\test\Target\LLVMIR\omptarget-debug-var-1.mlir
# executed command: 'c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\mlir-translate.exe' -mlir-to-llvmir 'C:\Users\tcwg\llvm-worker\flang-arm64-windows-msvc\llvm-project\mlir\test\Target\LLVMIR\omptarget-debug-var-1.mlir'
# .---command stderr------------
# | Assertion failed: !I.DebugMarker && "DebugMarker already set on old-format instrs?", file C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/llvm/lib/IR/BasicBlock.cpp, line 63
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
# | Stack dump:
# | 0.	Program arguments: c:\\users\\tcwg\\llvm-worker\\flang-arm64-windows-msvc\\build\\bin\\mlir-translate.exe -mlir-to-llvmir C:\\Users\\tcwg\\llvm-worker\\flang-arm64-windows-msvc\\llvm-project\\mlir\\test\\Target\\LLVMIR\\omptarget-debug-var-1.mlir
# | Exception Code: 0xC000001D
# | #0 0x00007ff60c612944 mlir::detail::FallbackTypeIDResolver::registerImplicitTypeID(class llvm::StringRef) (c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\mlir-translate.exe+0x852944)
# | #1 0x00007ff8d470ae50 (C:\WINDOWS\System32\ucrtbase.dll+0x7ae50)
# | #2 0x1a007ff8d470ba5c 
# `-----------------------------
# error: command failed with exit status: 0xc000001d
# executed command: 'c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\filecheck.exe' 'C:\Users\tcwg\llvm-worker\flang-arm64-windows-msvc\llvm-project\mlir\test\Target\LLVMIR\omptarget-debug-var-1.mlir'
# .---command stderr------------
# | FileCheck error: '<stdin>' is empty.
# | FileCheck command line:  c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\filecheck.exe C:\Users\tcwg\llvm-worker\flang-arm64-windows-msvc\llvm-project\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