Extend alerts() functionality to ScriptForm

[arthanson]

NetBox version

v4.1.6

Feature type

Change to existing functionality

Triage priority

N/A

Proposed functionality

Extend the alert template functionality for Plugins (https://netbox.readthedocs.io/en/stable/plugins/development/views/#extra-template-content) to the Script Form.

Use case

The branching plugin will require this to put an alert on the Script Form If in a branch.

Database changes

N/A

External dependencies

N/A

[jeremystretch]

This can be done in develop for NetBox v4.1; it doesn't need a milestone.