give more detail in exception message for a bad form AJAX callback in buildResponse()

Patch for Drupal 9.5

The test fails here, so should be fixed. I think this needs only a 10.1 patch.

re-rolled for 10.1

The exception message for an AJAX callback error has been modified in this patch. Please review.

@roshni27 your patch changes a lot more things than the previous patch. Could you supply an interdiff and explain what new changes you've introduced?

There's also at least one code style error - else{} should not be coddled.

I've updated the code to enhance exception messages, so they now indicate whether the callback is null, empty, or missing, and also offer specific details about the type of callback failure. This improvement makes it simpler to identify and resolve issues with AJAX callbacks.if there is any mistake please guide me.

Think this will need issue summary for clear definition of what's changed

Patch #26 = 10.8
Patch #27 = 5.85
Patch #28 = 6.4

I have attached patch for D11. Also I have attached interdiff with #29, it contains so many unwanted changes. please review

Still needs issue summary update.

There are various comment-wrapping and comment changes which while useful, are out of scope for this issue.

@smustgrave What needs to be added to the IS?

The patches have kinda gone all over the place. Think it could be useful to say exactly what is being fixed here.

Will this do?

Think that should help.