[clang] [clang-tools-extra] [flang] [lldb] [llvm] Reapply "[clang] Refactor to remove clangDriver dependency from clangFrontend and flangFrontend (#165277)" (PR #169599)

[Naveen Seth Hanig via llvm-commits]

naveen-seth wrote:

It seems like the Bazel Build/Test run is currently also failing for other PRs, so I added the Bazel related changes back to this PR. I hope this is okay despite failing.
@googlewalt

https://github.com/llvm/llvm-project/pull/169599