[MM-33908] Resync LDAP Groups to Teams and Channels (#17372)

* add includeRemovedMembers flag

* fix API call in client4.go

* remove check for 'since'

* add comments

* run make app-layers

* re-run CI tests

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

store/store.go

@@ -768,13 +768,17 @@ type GroupStore interface {
 	// based on the groups configurations. The returned list can be optionally scoped to a single given team.
 	//
 	// Typically since will be the last successful group sync time.
-	TeamMembersToAdd(since int64, teamID *string) ([]*model.UserTeamIDPair, error)
+	// If includeRemovedMembers is true, then team members who left or were removed from the team will
+	// be included; otherwise, they will be excluded.
+	TeamMembersToAdd(since int64, teamID *string, includeRemovedMembers bool) ([]*model.UserTeamIDPair, error)
 
 	// ChannelMembersToAdd returns a slice of UserChannelIDPair that need newly created memberships
 	// based on the groups configurations. The returned list can be optionally scoped to a single given channel.
 	//
 	// Typically since will be the last successful group sync time.
-	ChannelMembersToAdd(since int64, channelID *string) ([]*model.UserChannelIDPair, error)
+	// If includeRemovedMembers is true, then channel members who left or were removed from the channel will
+	// be included; otherwise, they will be excluded.
+	ChannelMembersToAdd(since int64, channelID *string, includeRemovedMembers bool) ([]*model.UserChannelIDPair, error)
 
 	// TeamMembersToRemove returns all team members that should be removed based on group constraints.
 	TeamMembersToRemove(teamID *string) ([]*model.TeamMember, error)