[clang] [clang-tools-extra] [clang][lex] Remove `HeaderFileInfo::Framework` (PR #114460)

[Cyndy Ishida via cfe-commits]

https://github.com/cyndyishida approved this pull request.

I initially touched this code because I needed to be able to map back input headers from a destination location (DSTROOT) to where they were resolved with headermaps (SRCROOT) for `tapi`/`clang-installapi`. But looking at the code it only really calls into `getIncludeNameForHeader()` for this now, so seems fine. 

https://github.com/llvm/llvm-project/pull/114460