mprove github-actions to recognize Clang Static Analyzer issues

A lot of Clang Static Analyzer issues are labeled with just `clang` label, not `clang:static analyzer`. It'll be great to `github-actions` to fix that. However, there are many variations it titles (see https://github.com/llvm/llvm-project/labels/clang%3Astatic%20analyzer). Also crash stack with `clang::ento::` namespace is clear indication of  Clang Static Analyzer problem.