fix: Disable automations on auto-reply emails (#12101)

The term "sorcerer’s apprentice mode" is defined as a bug in a protocol
where, under some circumstances, the receipt of a message causes
multiple messages to be sent, each of which, when received, triggers the
same bug. - RFC3834

Reference: https://github.com/chatwoot/chatwoot/pull/9606

This PR:
- Adds an auto_reply attribute to message.
- Adds an auto_reply attribute to conversation. 
- Disable conversation_created / conversation_opened event if auto_reply
is set.
- Disable message_created event if auto_reply is set.

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

spec/mailboxes/support_mailbox_spec.rb

@@ -56,7 +56,7 @@ RSpec.describe SupportMailbox do
     let(:described_subject) { described_class.receive support_mail }
     let(:serialized_attributes) do
       %w[bcc cc content_type date from html_content in_reply_to message_id multipart number_of_attachments references subject
-         text_content to]
+         text_content to auto_reply]
     end
     let(:conversation) { Conversation.where(inbox_id: channel_email.inbox).last }