[clang] [clang] missing changes to the Rewriter (PR #152845)

[Aiden Grossman via cfe-commits]

boomanaiden154 wrote:

> Though I note that we try to test any components that are actually modified, and this doesn't happen for the rewriter, so it gets no tests at all.

We do this at the project level rather than at the level of individual options. The only exception we make is for ClangIR which is in a bit of a unique position in that there is very active upstream development but it is not enabled by default.

https://github.com/llvm/llvm-project/pull/152845