Spam check only when Snippet / Issue "title" or "description" are changed

With this MR we're narrowing when the spam check is triggered and properly presenting the errors when trying to update the description with an AJAX call (i.e. task lists).

EE Backport gitlab-ee!1479

See #29483 (moved), #29645 (closed) for more info.

Screenshots (if relevant)

Closes #29483 (moved), #29645 (closed)

added 27 commits

• 2e660ca8...4ea85da9 - 25 commits from branch master
• af0be945 - Present ajax call errors when failing to update an Issue
• f7ac3e4a - Spam check only when spammable attributes have changed

Compare with previous version

mentioned in issue #29527 (closed)

added 2 commits

• a8b0c05c - Present ajax call errors when failing to update an Issue
• af958079 - Spam check only when spammable attributes have changed

Compare with previous version

@jarka could you take a look please?

assigned to @jarka

Thanks @oswaldo . I just have few comments.

assigned to @oswaldo

added 2 commits

• 86ef67ee - Present ajax call errors when failing to update an Issue
• d730b69e - Spam check only when spammable attributes have changed

Compare with previous version

Thanks @jarka, I've addressed your comments

changed title from Spam check only when "title" or "description" are changed to Spam check only when Snippet / Issue "title" or "description" are changed

@smcgivern Could you pick this one to have a look?

@jarka should have another look first

assigned to @jarka

resolved all discussions

thanks, seems ok to me