[llvm] [BOLT] Allow pass-through blocks in YAMLProfileReader (PR #91828)

[Amir Ayupov via llvm-commits]

aaupov wrote:

> Is it possible that we remove more blocks in the chain? E.g. A -> [ B -> C -> ] D?

Yes. Neither DataReader nor YAMLProfileReader will recognize that.

https://github.com/llvm/llvm-project/pull/91828