- Use uuids along with names to sync with gallery until market place team fixes the query issue

- Adopt dependencies in gallery to be case insensitive
- Adopt dependencies in local to be case insensitive

- Adopt to gallery extension id (lowercase) while scanning local extensions in Extension management and Extension host

-  id is pub.name. name in lower case.
- use id to match sync installed extension with gallery extension
- use id to identify extension while installing and uninstalling
- Clean up
- Remove IExtensionIdentity
- Add util methods to create gallery id and local extension id

fixes #13603

fixes #9935