Avoid touching passed in options object (fixes microsoft/monaco-editor#2210) and avoid deep cloning overflowWidgetsDomNode (fixes microsoft/monaco-editor#2184)

This treats tabs faked using spaces as if they were real tabs meaning that you can't select the middle of them.

 => comments.insertSpace

For #79144

Currently we duplicate information for the `editor` and `workbench` configuration nodes in a few places. This change extracts some of those to be constants instead

For #82718
Fixes #52846

This adds a newly proposed codeActions contribution point. For details, see #82718

This change also makes the intellisense for the `editor.codeActionsOnSave` property dynamic by using the new contribution point

Reverts 61938981

This reverts commit 99dc069a.