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/reply_mailbox_spec.rb

@@ -12,7 +12,8 @@ RSpec.describe ReplyMailbox do
     let(:conversation) { create(:conversation, assignee: agent, inbox: create(:inbox, account: account, greeting_enabled: false), account: account) }
     let(:described_subject) { described_class.receive reply_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]
+      %w[bcc cc content_type date from html_content in_reply_to message_id multipart number_of_attachments references subject text_content to
+         auto_reply]
     end
 
     context 'with reply uuid present' do