[PATCH] D152096: [Clang] Check for abstract parameters only when functions are defined.

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The C++ standard allows abstract parameters in deleted functions
and in function declarations

> The type of a parameter or the return type for a function definition
> shall not be a (possibly cv-qualified) class type that is
> incomplete or abstract within the function body
> unless the function is deleted.

Fixes https://github.com/llvm/llvm-project/issues/63012


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152096

Files:
  clang/docs/ReleaseNotes.rst
  clang/lib/Sema/SemaChecking.cpp
  clang/lib/Sema/SemaDecl.cpp
  clang/lib/Sema/SemaDeclCXX.cpp
  clang/test/CXX/class.derived/class.abstract/p3.cpp
  clang/test/CXX/drs/dr6xx.cpp
  clang/test/SemaCXX/abstract.cpp
  clang/test/SemaCXX/auto-type-from-cxx.cpp
  clang/test/SemaObjCXX/parameters.mm

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