[MM-13746] Add GetTeamMembersForUser and GetChannelMembersForUser apis (#10269)

* Add GetTeamMembersForUser and GetChannelMembersForUser apis

* Address comments

* Fix tests

* Fix test

* Fix comment

* Fix minimum server version

* Change to []*model.ChannelMember

* Fix panic, add more tests

* Remove print statement

store/sqlstore/channel_store.go

@@ -1923,6 +1923,21 @@ func (s SqlChannelStore) GetMembersForUser(teamId string, userId string) store.S
 	})
 }
 
+func (s SqlChannelStore) GetMembersForUserWithPagination(teamId, userId string, page, perPage int) store.StoreChannel {
+	return store.Do(func(result *store.StoreResult) {
+		var dbMembers channelMemberWithSchemeRolesList
+		offset := page * perPage
+		_, err := s.GetReplica().Select(&dbMembers, CHANNEL_MEMBERS_WITH_SCHEME_SELECT_QUERY+"WHERE ChannelMembers.UserId = :UserId Limit :Limit Offset :Offset", map[string]interface{}{"TeamId": teamId, "UserId": userId, "Limit": perPage, "Offset": offset})
+
+		if err != nil {
+			result.Err = model.NewAppError("SqlChannelStore.GetMembersForUserWithPagination", "store.sql_channel.get_members.app_error", nil, "teamId="+teamId+", userId="+userId+", err="+err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		result.Data = dbMembers.ToModel()
+	})
+}
+
 func (s SqlChannelStore) AutocompleteInTeam(teamId string, term string, includeDeleted bool) store.StoreChannel {
 	return store.Do(func(result *store.StoreResult) {
 		deleteFilter := "AND c.DeleteAt = 0"

store/sqlstore/team_store.go

@@ -670,6 +670,20 @@ func (s SqlTeamStore) GetTeamsForUser(userId string) store.StoreChannel {
 	})
 }
 
+func (s SqlTeamStore) GetTeamsForUserWithPagination(userId string, page, perPage int) store.StoreChannel {
+	return store.Do(func(result *store.StoreResult) {
+		var dbMembers teamMemberWithSchemeRolesList
+		offset := page * perPage
+		_, err := s.GetReplica().Select(&dbMembers, TEAM_MEMBERS_WITH_SCHEME_SELECT_QUERY+"WHERE TeamMembers.UserId = :UserId Limit :Limit Offset :Offset", map[string]interface{}{"UserId": userId, "Limit": perPage, "Offset": offset})
+		if err != nil {
+			result.Err = model.NewAppError("SqlTeamStore.GetTeamsForUserWithPagination", "store.sql_team.get_members.app_error", nil, "userId="+userId+" "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		result.Data = dbMembers.ToModel()
+	})
+}
+
 func (s SqlTeamStore) GetChannelUnreadsForAllTeams(excludeTeamId, userId string) store.StoreChannel {
 	return store.Do(func(result *store.StoreResult) {
 		var data []*model.ChannelUnread