Add search engine support for files (#16190)

* Add search engine support for files

* Fixing i18n

* Fix golangci-lint

* Fix consistency problem in the Search receiver functio of the SqlFileStore

* Fixing some tests

* Fixing test

* Apply suggestions from code review

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

* Addressing PR review comments

* Removing some empty lines

* Address PR review comments

* Fixing problem after merge master

* Fixing spelling problem

* Add missed translations

* Fixing certain global variable usages after merge master

* Fixing some constants usage

* Fixing goimports order

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

store/searchlayer/layer.go

@@ -19,6 +19,7 @@ type SearchStore struct {
 	team         *SearchTeamStore
 	channel      *SearchChannelStore
 	post         *SearchPostStore
+	fileInfo     *SearchFileInfoStore
 	configValue  atomic.Value
 }
 
@@ -32,6 +33,7 @@ func NewSearchLayer(baseStore store.Store, searchEngine *searchengine.Broker, cf
 	searchStore.post = &SearchPostStore{PostStore: baseStore.Post(), rootStore: searchStore}
 	searchStore.team = &SearchTeamStore{TeamStore: baseStore.Team(), rootStore: searchStore}
 	searchStore.user = &SearchUserStore{UserStore: baseStore.User(), rootStore: searchStore}
+	searchStore.fileInfo = &SearchFileInfoStore{FileInfoStore: baseStore.FileInfo(), rootStore: searchStore}
 
 	return searchStore
 }
@@ -52,6 +54,10 @@ func (s *SearchStore) Post() store.PostStore {
 	return s.post
 }
 
+func (s *SearchStore) FileInfo() store.FileInfoStore {
+	return s.fileInfo
+}
+
 func (s *SearchStore) Team() store.TeamStore {
 	return s.team
 }