Title and details in alerts body should be configurable

[pranay01]

Currently, only the alerts description in alerts is configurable.

For alerts fired/resolved message, there should be a way to change:

1. The part shown after brackets in title, I didn't find a way to configure this -> [(temporality="Unspecified", host_id="FC88CAE7-3EC7-5786-92AF-17F3CD389655", host_name="Pranays-MacBook-Pro.local", os_type="darwin", severity="warning")]

2. The part shown in details of the alert body. I saw I can change the alert description, but no way to configure on what appears in the details section, which has fields like rule-id, host-id, etc. which may not always be relevant