[clang] [ASTMatchers] Fix classIsDerivedFrom for recusrive cases (PR #67307)

[Sam McCall via cfe-commits]

sam-mccall wrote:

@Caslyn that failure doesn't look plausible for this commit, there's no dependency on AST matchers

I'm not familiar with this buildbot, but it looks like there was an infra problem (failing install step) for a while that recently got fixed, and this test failure existed before that, e.g.:

https://luci-milo.appspot.com/ui/p/fuchsia/builders/prod/clang-windows-x64/b8769222591305138273/overview

https://github.com/llvm/llvm-project/pull/67307