Add linting rule to require overriding default description for ARM POST actions and other non-lifecycle operations

This should prevent using standard generic default operation descriptions, which can adversely affect API and SDK documentation as well as Portal and other UI.

The issue names no files, tests, or entry points. Begin by locating the repository's existing linting rules and determine how ARM POST actions and other non-lifecycle operations are identified; done when generic default operation descriptions are rejected for those cases while lifecycle operations remain unaffected.

Written by the indexing model from the issue text.