Replace direct console.log/warn/error calls in the WebGL addon with
ILogService so messages respect the terminal logLevel and custom logger.
Fixesxtermjs/xterm.js#5921
Co-authored-by: Daniel Imms <Tyriar@users.noreply.github.com>
Register vertex array objects for disposal in GlyphRenderer and
RectangleRenderer, matching existing buffer and program cleanup.
Fixes#5918
Co-authored-by: Daniel Imms <Tyriar@users.noreply.github.com>