[clang] [CIR] Infrastructure: class CIRGenBuilderTy; cache CIR types (PR #119037)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

1 question, else LGTM.  @lanza or @bcardosolopes should be the one to approve this, as this is basically all directly CIR related.

https://github.com/llvm/llvm-project/pull/119037