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

store/sqlstore/post_store.go

@@ -803,6 +803,11 @@ func (s *SqlPostStore) Search(teamId string, userId string, params *model.Search
 
 		var posts []*model.Post
 
+		deletedQueryPart := "AND DeleteAt = 0"
+		if params.IncludeDeletedChannels {
+			deletedQueryPart = ""
+		}
+
 		searchQuery := `
 			SELECT
 				*
@@ -822,7 +827,7 @@ func (s *SqlPostStore) Search(teamId string, userId string, params *model.Search
 						Id = ChannelId
 							AND (TeamId = :TeamId OR TeamId = '')
 							AND UserId = :UserId
-							AND DeleteAt = 0
+							` + deletedQueryPart + `
 							CHANNEL_FILTER)
 				SEARCH_CLAUSE
 				ORDER BY CreateAt DESC