Provide error context for typed array clone check

This patch adds output of `ConvertError`'s `Display` to debug-only
check's panic message which provides additional context when type
mismatch happens.

Panic message would include the intended type name and what was given
instead of it.

The output would look roughly like this:
```
copied array should have same type as original array:
expected array of type Builtin(DICTIONARY), got Untyped: []
```

Author: mivort

godot-core/src/builtin/collections/array.rs

@@ -1245,8 +1245,9 @@ impl<T: ArrayElement> Clone for Array<T> {
 
         // Double-check copy's runtime type in Debug mode.
         if cfg!(debug_assertions) {
-            copy.with_checked_type()
-                .expect("copied array should have same type as original array")
+            copy.with_checked_type().unwrap_or_else(|e| {
+                panic!("copied array should have same type as original array: {e}")
+            })
         } else {
             copy
         }