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

[Paul T Robinson via cfe-commits]

pogo59 wrote:

> @pogo59 - you might find this interesting in terms of bitrotten tests, etc.

Fixing these typos is great. Identifying recurring patterns in the typos would help motivate changes to FileCheck itself to detect them sooner. I think @jdenny-ornl might have had some private patches, or an old PR, or something, in that direction.

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