Since D106876, PCM files don't report module maps as input files unless they contributed to the compilation.

Reporting only module maps of (transitively) imported modules is not enough, though. For modules marked with `[no_undeclared_includes]`, other module maps affect the compilation by introducing anti-dependencies.

This patch makes sure such module maps are being reported as input files.

Depends on D120463.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D120464

This patch simplifies a test that checks only used module map files are reported as input files in PCM files.

Instead of using opaque `diff`, this patch uses `clang -module-file-info` and `FileCheck` to verify this.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D120463

Problem:
PCM file includes references to all module maps used in compilation which created PCM. This problem leads to PCM-rebuilds in distributed compilations as some module maps could be missing in isolated compilation. (For example in our distributed build system we create a temp folder for every compilation with only modules and headers that are needed for that particular command).

Solution:
Add only affecting module map files to a PCM-file.

Reviewed By: rsmith

Differential Revision: https://reviews.llvm.org/D106876