[llvm] [StaticDataLayout][PGO]Implement reader and writer change for data access profiles (PR #139997)

[Teresa Johnson via llvm-commits]

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@@ -35,4 +35,15 @@ HeapProfileRecords:
         - { Function: 0x7777777777777777, LineOffset: 77, Column: 70, IsInlineFrame: true }
         - { Function: 0x8888888888888888, LineOffset: 88, Column: 80, IsInlineFrame: false }
         CalleeGuids: [ 0x300 ]
+DataAccessProfiles:
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teresajohnson wrote:

The new test is good too, but what I meant was a test that if the version given to llvm-profdata merge is <4 that we don't get the DAP output.

https://github.com/llvm/llvm-project/pull/139997