Alerting: Fix child provisioned polices not being rendered as provisioned

[soniaAguilarPeiron]

What is this feature?

This PR fixes child provisioned policies not being rendered as provisioned in the policies view.

Why do we need this feature?

Provisioned policies should be rendered as provisioned (and not editable as a consequence).

Who is this feature for?

All users.

Special notes for your reviewer:

Before the fix:

After the fix:

Please check that:

• It works as expected from a user's perspective.
• If this is a pre-GA feature, it is behind a feature toggle.
• The docs are updated, and if this is a notable improvement, it's added to our What's New doc.

[konrad147]

LGTM!