[MM-21464] api4/channel: add ability to force move channel by removing non-members (#14887)

* api4/channel: add ability to force move channel by removing non-members

* app/channel: add log to move channel for non taget team members

* app/channel: add tets for remove non-team members for channel

* Update api4/channel_test.go

Co-authored-by: Eli Yukelzon <reflog@gmail.com>

Co-authored-by: Eli Yukelzon <reflog@gmail.com>

api4/channel.go

@@ -1810,6 +1810,12 @@ func moveChannel(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	force, ok := props["force"].(bool)
+	if !ok {
+		c.SetInvalidParam("force")
+		return
+	}
+
 	team, err := c.App.GetTeam(teamId)
 	if err != nil {
 		c.Err = err
@@ -1845,6 +1851,14 @@ func moveChannel(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if force {
+		err = c.App.RemoveUsersFromChannelNotMemberOfTeam(user, channel, team)
+		if err != nil {
+			c.Err = err
+			return
+		}
+	}
+
 	err = c.App.MoveChannel(team, channel, user)
 	if err != nil {
 		c.Err = err