[clang] Fix unexpected -Wconstant-logical-operand in C23 (llvm#80724)

C23 has `bool`, but logical operators still return int. Check that
we're not in C to avoid false-positive -Wconstant-logical-operand.

Fixes llvm#64356

(cherry picked from commit a18e92d)

clang/docs/ReleaseNotes.rst

@@ -901,6 +901,10 @@ Bug Fixes in This Version
 - Fixed the definition of ``ATOMIC_FLAG_INIT`` in ``<stdatomic.h>`` so it can
   be used in C++.
 
+- Clang now doesn't produce false-positive warning `-Wconstant-logical-operand`
+  for logical operators in C23.
+  Fixes (`#64356 <https://github.com/llvm/llvm-project/issues/64356>`_).
+
 Bug Fixes to Compiler Builtins
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^