[llvm] [utils][TableGen] Handle versions on clause/directive spellings (PR #143021)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-darwin` running on `doug-worker-3` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/23/builds/11030

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'Clangd Unit Tests :: ./ClangdTests/0/11' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/tools/clang/tools/extra/clangd/unittests/./ClangdTests-Clangd Unit Tests-80671-0-11.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=11 GTEST_SHARD_INDEX=0 /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/tools/clang/tools/extra/clangd/unittests/./ClangdTests
--

Script:
--
/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/tools/clang/tools/extra/clangd/unittests/./ClangdTests --gtest_filter=BackgroundIndexTest.Config
--
Enqueueing 1 commands for indexing
Failed to load shard: /clangd-test/foo.cpp
Enqueueing 1 commands for indexing
Enqueueing 1 commands for indexing
Failed to load shard: /clangd-test/bar.cpp
/Users/buildbot/buildbot-root/x86_64-darwin/llvm-project/clang-tools-extra/clangd/unittests/BackgroundIndexTests.cpp:159: Failure
Value of: Idx.blockUntilIdleForTest()
  Actual: false
Expected: true

Indexing foo.cpp (digest:=8709C880CCEBA03C)
Indexing bar.cpp (digest:=2CD19DD50C281BBA)
Indexed foo.cpp (2 symbols, 1 refs, 2 files)
Indexed bar.cpp (2 symbols, 1 refs, 2 files)

/Users/buildbot/buildbot-root/x86_64-darwin/llvm-project/clang-tools-extra/clangd/unittests/BackgroundIndexTests.cpp:159
Value of: Idx.blockUntilIdleForTest()
  Actual: false
Expected: true



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


```

</details>

https://github.com/llvm/llvm-project/pull/143021