[clang] [ASTMatchers] forCallable should not erase binding on success (PR #89657)

[Marco Borgeaud via cfe-commits]

marco-antognini-sonarsource wrote:

Could someone review this PR, please? Any feedback you can give me is welcome.

The CI should be green and I've disabled keeping my email private.

Pinging some recent contributors/reviewers to AST Matchers. @danix800, @AaronBallman, @shafik, @PiotrZSL, @steakhal, @cor3ntin

Thanks

https://github.com/llvm/llvm-project/pull/89657