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

[Dhruv Chawla via cfe-commits]

https://github.com/dc03-work commented:

I am surprised that these typos even exist within the tests (and don't seem to be causing issues somehow).

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