Revert .gitignore to original state

Co-authored-by: benhillis <17727402+benhillis@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -66,4 +66,4 @@ tools/clang-format.exe
 doc/site/
 directory.build.targets
 test-storage/
-*.vhdx_codeql_detected_source_root
+*.vhdx