Disable lint_on_text_changed for some linters

Some linters are fast enough to run during text changing, but some linters are too slow for this. This is particularly annoying when you create a problem during typing, then fix the issue but the issue is still marked for seconds because the linter is still running.

I can disable all linting during text changing with `let g:ale_lint_on_text_change = 0` but I only want to do that for the slow linters, and not the fast ones.

Would it be possible to add configuration options for each linter when it is run or not?

Start by tracing how g:ale_lint_on_text_change is read and how individual linters are scheduled during text changes. Review the existing linter configuration and documentation paths; done means users can choose this behavior per linter while fast linters continue running normally.

Written by the indexing model from the issue text.