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

[Thomas Preud'homme via llvm-commits]

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@@ -58,7 +58,7 @@ CHECK-CNT3-NOT:     {{^}}this is duplicate
 CHECK-CNT4-COUNT-5: this is duplicate
 CHECK-CNT4-EMPTY:
 
-Many-label:
+Many-LABEL:
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RoboTux wrote:

IMO this makes it harder to spot that this is *not* a FileCheck directive. I think we should drop all the changes in this file.

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