[clang-tidy] Simplify RenamerClangTidyCheck API (#88268)

Some functions allow a null SourceManager, no SourceManager, or a
SourceManager in an inconsistent argument position. Since SourceManager
is generally not null and it doesn't make sense to apply renaming
without one, these inconsistencies are now gone.

GitOrigin-RevId: 54a6798e0a3630e705ed32dbbd63414a16331085
2 files changed