[llvm] [TBAA] Add verifier for tbaa.struct metadata (PR #86709)

[Amy Kwan via llvm-commits]

amy-kwan wrote:

I believe this patch is still causing failures on the PPC64BE bots in the recent builds: https://lab.llvm.org/buildbot/#/builders/93/builds/19428/steps/10/logs/stdio

The errors are similar to what @uweigand reported.

https://github.com/llvm/llvm-project/pull/86709