[clang] [Clang][Sema]: Diagnose lambda to bool implicit casts (PR #83152)

[Aaron Ballman via cfe-commits]

================
@@ -4127,8 +4127,8 @@ def ext_ms_impcast_fn_obj : ExtWarn<
   "Microsoft extension">, InGroup<MicrosoftCast>;
 
 def warn_impcast_pointer_to_bool : Warning<
-    "address of%select{| function| array}0 '%1' will always evaluate to "
-    "'true'">,
+    "address of%select{| function| array| lambda function pointer conversion operator}0 '%1' "
+    "will always evaluate to 'true'">,
----------------
AaronBallman wrote:

```suggestion
    "address of %select{'%1'|function '%1'|array '%1'|lambda function pointer "
    "conversion operator}0 will always evaluate to 'true'">,
```
Wrapping to 80-col limits, moves %1 so it's not used for lambda conversion operators.

https://github.com/llvm/llvm-project/pull/83152