[llvm] [SPIR-V] Add pre-commit CI workflow (PR #74092)

[Tom Stellard via llvm-commits]

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@@ -20,6 +22,10 @@ on:
         required: true
         type: string
 
+      experimental_targets:
+        required: false
+        type: string
+
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tstellar wrote:

Rather than adding an option for experimental targets, I think it would be better just to add an option to allow specifying extra cmake args.  This will give us more flexibility.

https://github.com/llvm/llvm-project/pull/74092