[clang] [NFC][clang] change remaining context-dependent type nodes to ContextualFoldingSet (PR #67751)

[Shafik Yaghmour via cfe-commits]

shafik wrote:

Thank you for the PR. Could you provide some context in the PR description? From the title it sounds like there were prior changes that this is finishing. It would be helpful to have a link to those prior changes.

https://github.com/llvm/llvm-project/pull/67751