Fixes #88229

There should a 1:1 mapping between VS Code's custom editors and custom editors (specifically the webviews) that extensions know about. This was previously not true as a single `CustomEditorInput` could end up being shared between multiple editor groups.

With this change, we always create a copy of the custom editor input during split, and then add a listener for `onDidCloseEditor` so that we can make sure we get rid of the unique inputs (and notify extensions of this)

Allows extension install and uninstall command execution to throw exceptions back to caller

* migrate search to use new setting

* rename

* add getViewLocation api to vds for search

* remove unreferenced location option

Merge branch 'user/gabrield/throwExceptionOnExtensionInstallFail' of https://github.com/GabeDeBacker/vscode into user/gabrield/throwExceptionOnExtensionInstallFail

Merge remote-tracking branch 'upstream/master' into user/gabrield/throwExceptionOnExtensionInstallFail

Adds a new optional `forQualities` property to built-in extensions,
and filters that as appropriate for different builds.

Fixes #88913: Make sure to always read the languageId/tokenType metadata from a valid TM token index