[MM-37984] Allow Desktop App to authenticate via external providers outside of the app on supported servers (#24140)

* [MM-37984] Allow Desktop App to authenticate via external providers outside of the app on supported servers

* PR feedback

* Add support for mattermost-dev protocol for development use

* Update server/channels/db/migrations/postgres/000110_create_desktop_tokens.up.sql

* Fix silly typo

* Update server/channels/db/migrations/postgres/000110_create_desktop_tokens.up.sql

* Remove storage of client token, only validate it on the client

* Update migrations

* Add concurrently create index

* Remove CONCURRENTLY for now

* Fix issue with changing history

* Remove old migration

* Use idempotent statement to drop old index

* Remove reference to old table

server/channels/db/migrations/migrations.list

@@ -220,6 +220,8 @@ channels/db/migrations/mysql/000109_create_persistent_notifications.down.sql
 channels/db/migrations/mysql/000109_create_persistent_notifications.up.sql
 channels/db/migrations/mysql/000111_update_vacuuming.down.sql
 channels/db/migrations/mysql/000111_update_vacuuming.up.sql
+channels/db/migrations/mysql/000112_rework_desktop_tokens.down.sql
+channels/db/migrations/mysql/000112_rework_desktop_tokens.up.sql
 channels/db/migrations/postgres/000001_create_teams.down.sql
 channels/db/migrations/postgres/000001_create_teams.up.sql
 channels/db/migrations/postgres/000002_create_team_members.down.sql
@@ -440,3 +442,5 @@ channels/db/migrations/postgres/000109_create_persistent_notifications.down.sql
 channels/db/migrations/postgres/000109_create_persistent_notifications.up.sql
 channels/db/migrations/postgres/000111_update_vacuuming.down.sql
 channels/db/migrations/postgres/000111_update_vacuuming.up.sql
+channels/db/migrations/postgres/000112_rework_desktop_tokens.down.sql
+channels/db/migrations/postgres/000112_rework_desktop_tokens.up.sql