[clang] [Clang][Sema] Reject array prvalue operands (PR #140702)

[via cfe-commits]

================
@@ -7639,6 +7639,8 @@ def warn_param_mismatched_alignment : Warning<
 
 def err_objc_object_assignment : Error<
   "cannot assign to class object (%0 invalid)">;
+def err_typecheck_array_prvalue_operand : Error<
+  "array prvalue is not permitted">;
----------------
languagelawyer wrote:

@zwuis is `"operand cannot be an array prvalue"` ok? Comparing to an existing error:
```c++
	IA{ 1, 2, 3 } + 0.;
	IA{ 1, 2, 3 } + 0;
```
```
test.cxx:5:16: error: invalid operands to binary expression ('int[3]' and 'double')
test.cxx:6:16: error: operand cannot be an array prvalue
```

https://github.com/llvm/llvm-project/pull/140702