Allow filtering of reply text with comment context

[aaroncampbell]

I know you can specify the reply text for comments, but you can't make them specific to each comment such as "Reply to comment #1234 by Joe". This will let you do that by adding a filter called comment_reply_link_text to get_comment_reply_link() that passes along $args, $comment, and $post (just like the existing comment_reply_link filter).

I know you COULD do this with some processing on the link, but it would require pulling comment and post IDs from the URL and/or onclick, then replacing the text in the link itself. This way would be a lot simpler and only adds a single filter.

Perhaps we can pass $text to the existing filter making it very easy for a plugin to replace it instead of adding another filter. Would save a bit of overhead.

See also #16433