[clang] [NFC][Clang] Move set functions out BranchProtectionInfo. (PR #98451)

[Nikita Popov via cfe-commits]

================
@@ -133,7 +133,7 @@ class AArch64TargetCodeGenInfo : public TargetCodeGenInfo {
       }
     }
     auto *Fn = cast<llvm::Function>(GV);
-    BPI.setFnAttributes(*Fn);
+    CGM.getTargetCodeGenInfo().setFnAttributes(BPI, *Fn);
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nikic wrote:

```suggestion
    setFnAttributes(BPI, *Fn);
```
We're inside AArch64TargetCodeGenInfo here, so I think this is just a member function?

https://github.com/llvm/llvm-project/pull/98451