[clang] [clang][Sema] Handle alloc_align on all HasFunctionProto declarations (PR #210871)

[Aaron Ballman via cfe-commits]

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@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+// expected-no-diagnostics
+
+ at interface AllocAlignMethod
+- (void *)allocate:(unsigned long)alignment
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AaronBallman wrote:

We should also have a test that shows we correctly diagnose an invalid parameter type.

https://github.com/llvm/llvm-project/pull/210871