Support overwrite updates on DarwinUpdateService (#288129)

* Update DarwinUpdateService to handle pending updates during checks and errors

* wip: test update server

* refactor: remove pending update handling from DarwinUpdateService

* show action

* feat: enhance update service to support explicit and overwrite states

* feat: add redirect functionality to update server

* fix: when checking for newer update, make the right call against the update service

also add logs since we're not getting the commit id :(

* fix: darwin auto update should use correct commit version

* fix: cleanup the code a bit

* updates

* feat: add Overwriting state to update process and update related logic

* fix: enhance update check with cancellation support and timeout handling

* nit: language

* do not attempt to overwrite updates twice

* remove test update server scripts