Pr 9039 (#9187)

* MM-11065: Allow to search and get archived channels from the API

* Fixing more tests

* Add some unit tests

* Add includeDeleted parameter to session permissions check function

* More test fixing

* Adding archive channels list in channels search

* Add restriction for archived channel edition

* Reverting permissions checks modification

* Changed the query parameter to include_deleted

* Enable search archive channels as true by default

* Adding tests for verify search on deleted channels

* Allowing to override archive channels during the imports

* Fixed test

* Search in archive channels from the API must be explicitly requested

* Removing includeDeleted parameter from GetChannelByName and GetChannelByNameForTeam

* Back to ViewArchivedChannels config

* Fixing tests

* Reverting GetChannelByName parameter

* Add include deleted parameter on GetChannel functions in plugins api

* Fixing tests

config/default.json

@@ -101,6 +101,7 @@
         "MaxNotificationsPerChannel": 1000,
         "EnableConfirmNotificationsToChannel": true,
         "TeammateNameDisplay": "username",
+        "ViewArchivedChannels": true,
         "ExperimentalEnableAutomaticReplies": false,
         "ExperimentalHideTownSquareinLHS": false,
         "ExperimentalTownSquareIsReadOnly": false,