MM-21210: Add LRU cache for ChannelStore.GetMembersForUser (#13593)

Automatic Merge

store/storetest/mocks/ChannelStore.go

@@ -1173,6 +1173,16 @@ func (_m *ChannelStore) InvalidateMemberCount(channelId string) {
 	_m.Called(channelId)
 }
 
+// InvalidateMembersForAllUsers provides a mock function with given fields:
+func (_m *ChannelStore) InvalidateMembersForAllUsers() {
+	_m.Called()
+}
+
+// InvalidateMembersForUser provides a mock function with given fields: userId
+func (_m *ChannelStore) InvalidateMembersForUser(userId string) {
+	_m.Called(userId)
+}
+
 // InvalidatePinnedPostCount provides a mock function with given fields: channelId
 func (_m *ChannelStore) InvalidatePinnedPostCount(channelId string) {
 	_m.Called(channelId)