Check Connect feature flag in more places (#14795)

app/models/organization_membership.rb

@@ -31,6 +31,8 @@ class OrganizationMembership < ApplicationRecord
   end
 
   def add_chat_channel_membership(user, channel, role)
+    return unless FeatureFlag.enabled?(:connect)
+
     membership = ChatChannelMembership.find_or_initialize_by(user_id: user.id, chat_channel_id: channel.id)
     membership.role = role
     membership.save

app/services/tag_moderators/add.rb

@@ -15,7 +15,7 @@ module TagModerators
         tag = Tag.find(tag_ids[index])
         add_tag_mod_role(user, tag)
         ::TagModerators::AddTrustedRole.call(user)
-        add_to_chat_channels(user, tag)
+        add_to_chat_channels(user, tag) if FeatureFlag.enabled?(:connect)
         tag.update(supported: true) unless tag.supported?
 
         NotifyMailer