[llvm] [clang] [lld] [AMDGPU] Rename COV module flag to amdhsa_code_object_version (PR #79905)

[Saiyedul Islam via cfe-commits]

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@@ -25,4 +25,4 @@ entry:
 }
 
 !llvm.module.flags = !{!0}
-!0 = !{i32 1, !"amdgpu_code_object_version", i32 500}
+!0 = !{i32 1, !"amdhsa_code_object_version", i32 500}
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saiislam wrote:

Can we remove explicit mention of COV5 module flag in all these test files given that the current default is COV5?
Or, may be a separate patch would be better for that.

https://github.com/llvm/llvm-project/pull/79905