html: Add support for autoclosing of tags (#11761)

Fixes #5267 
TODO:
- [x] Publish our fork of vscode-langservers-extracted on GH and wire
that through as a language server of choice for HTML extension.
- [x] Figure out how to prevent edits made by remote participants from
moving the cursor of a host.

Release Notes:

- Added support for autoclosing of HTML tags in local projects.