Shared channels auto-share DM & group messages (#26097)

* option for auto inviting plugin to all shared channels.
* auto-invite remotes to shared channels when flag set

server/platform/services/sharedchannel/mock_AppIface_test.go

@@ -288,11 +288,6 @@ func (_m *MockAppIface) GetProfileImage(user *model.User) ([]byte, bool, *model.
 	return r0, r1, r2
 }
 
-// InvalidateCacheForUser provides a mock function with given fields: userID
-func (_m *MockAppIface) InvalidateCacheForUser(userID string) {
-	_m.Called(userID)
-}
-
 // MentionsToTeamMembers provides a mock function with given fields: c, message, teamID
 func (_m *MockAppIface) MentionsToTeamMembers(c request.CTX, message string, teamID string) model.UserMentionMap {
 	ret := _m.Called(c, message, teamID)
@@ -410,6 +405,11 @@ func (_m *MockAppIface) PermanentDeleteChannel(c request.CTX, channel *model.Cha
 	return r0
 }
 
+// Publish provides a mock function with given fields: message
+func (_m *MockAppIface) Publish(message *model.WebSocketEvent) {
+	_m.Called(message)
+}
+
 // SaveReactionForPost provides a mock function with given fields: c, reaction
 func (_m *MockAppIface) SaveReactionForPost(c request.CTX, reaction *model.Reaction) (*model.Reaction, *model.AppError) {
 	ret := _m.Called(c, reaction)