[clang] [Tooling/Inclusion] Update std symbols mapping (PR #113612)

[kadir çetinkaya via cfe-commits]

https://github.com/kadircet requested changes to this pull request.

thanks a ton for the comprehensive change, i think this looks amazing!

can you just move the parser changes into a separate PR and revert changes in the assertion and rather delete the duplicates from stdspecialsymbolmap?

https://github.com/llvm/llvm-project/pull/113612