[Github] Build clang docs in CI if autogenerated files change (#72623)

These are unlikely to produce errors in the build, assuming that the
tablegen emitter works as expected, but we're still losing some
documentation build testing coverage but not building upon changes to
these files.

Author: boomanaiden154

.github/workflows/docs.yml

@@ -15,6 +15,9 @@ on:
     paths:
       - 'llvm/docs/**'
       - 'clang/docs/**'
+      - 'clang/include/clang/Basic/AttrDocs.td'
+      - 'clang/include/clang/Driver/ClangOptionDocs.td'
+      - 'clang/include/clang/Basic/DiagnosticDocs.td'
       - 'clang-tools-extra/docs/**'
       - 'lldb/docs/**'
       - 'libunwind/docs/**'
@@ -29,6 +32,9 @@ on:
     paths:
       - 'llvm/docs/**'
       - 'clang/docs/**'
+      - 'clang/include/clang/Basic/AttrDocs.td'
+      - 'clang/include/clang/Driver/ClangOptionDocs.td'
+      - 'clang/include/clang/Basic/DiagnosticDocs.td'
       - 'clang-tools-extra/docs/**'
       - 'lldb/docs/**'
       - 'libunwind/docs/**'
@@ -64,6 +70,9 @@ jobs:
               - 'llvm/docs/**'
             clang:
               - 'clang/docs/**'
+              - 'clang/include/clang/Basic/AttrDocs.td'
+              - 'clang/include/clang/Driver/ClangOptionDocs.td'
+              - 'clang/include/clang/Basic/DiagnosticDocs.td'
             clang-tools-extra:
               - 'clang-tools-extra/docs/**'
             lldb: