PLT-4990 - Server: Split out channel permissions to Create/Manage/Delete (#4864)

* Server side changes.

* Fix unit tests and default config.

utils/config.go

@@ -238,8 +238,12 @@ func getClientConfig(c *model.Config) map[string]string {
 	props["EnableOpenServer"] = strconv.FormatBool(*c.TeamSettings.EnableOpenServer)
 	props["RestrictDirectMessage"] = *c.TeamSettings.RestrictDirectMessage
 	props["RestrictTeamInvite"] = *c.TeamSettings.RestrictTeamInvite
+	props["RestrictPublicChannelCreation"] = *c.TeamSettings.RestrictPublicChannelCreation
+	props["RestrictPrivateChannelCreation"] = *c.TeamSettings.RestrictPrivateChannelCreation
 	props["RestrictPublicChannelManagement"] = *c.TeamSettings.RestrictPublicChannelManagement
 	props["RestrictPrivateChannelManagement"] = *c.TeamSettings.RestrictPrivateChannelManagement
+	props["RestrictPublicChannelDeletion"] = *c.TeamSettings.RestrictPublicChannelDeletion
+	props["RestrictPrivateChannelDeletion"] = *c.TeamSettings.RestrictPrivateChannelDeletion
 
 	props["EnableOAuthServiceProvider"] = strconv.FormatBool(c.ServiceSettings.EnableOAuthServiceProvider)
 	props["SegmentDeveloperKey"] = c.ServiceSettings.SegmentDeveloperKey