[clang] cc1: Report an error for multiple actions unless separated by -main-file-name (PR #91140)

[Fangrui Song via cfe-commits]

MaskRay wrote:

> This sounds good in principle, but some tests are failing in CI, so this might need more refinement.

There were `%clang_analyze_cc1 -analyze` (redundant `-analyze`) errors. Fixed by e4d242768aefabc0091dd01fabecaffbc2b6984b

https://github.com/llvm/llvm-project/pull/91140