Migrating Team.SaveMember/SaveMultipleMembers into errors (#14924)

* Migrating Team.SaveMember/SaveMultipleMembers into errors

* Removing copy/paste comments

* Fixing another small thing

* Fixing tests

* Addressing PR review comments

* Fixing some tests

* Fixing golangci-lint

* Fixing linter

* Regenerating store layers

* Fix lint error after merge

* Other lint error fixed

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

store/timerlayer/timerlayer.go

@@ -6490,7 +6490,7 @@ func (s *TimerLayerTeamStore) Save(team *model.Team) (*model.Team, *model.AppErr
 	return result, err
 }
 
-func (s *TimerLayerTeamStore) SaveMember(member *model.TeamMember, maxUsersPerTeam int) (*model.TeamMember, *model.AppError) {
+func (s *TimerLayerTeamStore) SaveMember(member *model.TeamMember, maxUsersPerTeam int) (*model.TeamMember, error) {
 	start := timemodule.Now()
 
 	result, err := s.TeamStore.SaveMember(member, maxUsersPerTeam)
@@ -6506,7 +6506,7 @@ func (s *TimerLayerTeamStore) SaveMember(member *model.TeamMember, maxUsersPerTe
 	return result, err
 }
 
-func (s *TimerLayerTeamStore) SaveMultipleMembers(members []*model.TeamMember, maxUsersPerTeam int) ([]*model.TeamMember, *model.AppError) {
+func (s *TimerLayerTeamStore) SaveMultipleMembers(members []*model.TeamMember, maxUsersPerTeam int) ([]*model.TeamMember, error) {
 	start := timemodule.Now()
 
 	result, err := s.TeamStore.SaveMultipleMembers(members, maxUsersPerTeam)