[clang] [clang-tools-extra] [flang] [llvm] [mlir] [polly] [test]: fix filecheck annotation typos (PR #91854)

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klensy wrote:

Ok, running https://gist.github.com/klensy/2a6cf62f228b676b73cb5b16a599b93b over current PR will give more hits, but with few FP, so be aware.

https://github.com/llvm/llvm-project/pull/91854