Avoid sending an unnecessary "clear diagnostics" message for clients supporting pull diagnostics#21105

MichaReiser merged 1 commit intoastral-sh:mainastral-sh/ruff:mainfrom

TaKO8Ki:capabilities-check-for-clear_diagnostics_for_documentTaKO8Ki/ruff:capabilities-check-for-clear_diagnostics_for_documentCopy head branch name to clipboard