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

model/config.go

@@ -1125,6 +1125,7 @@ type TeamSettings struct {
 	MaxNotificationsPerChannel          *int64
 	EnableConfirmNotificationsToChannel *bool
 	TeammateNameDisplay                 *string
+	ViewArchivedChannels                *bool
 	ExperimentalEnableAutomaticReplies  *bool
 	ExperimentalHideTownSquareinLHS     *bool
 	ExperimentalTownSquareIsReadOnly    *bool
@@ -1254,6 +1255,9 @@ func (s *TeamSettings) SetDefaults() {
 		s.EnableUserCreation = NewBool(true)
 	}
 
+	if s.ViewArchivedChannels == nil {
+		s.ViewArchivedChannels = NewBool(true)
+	}
 }
 
 type ClientRequirements struct {