Automatic merge from submit-queue

Fixes 47182

**What this PR does / why we need it**: Adds some state guards to the idle_status message to speed up the deployment

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #47182

**Special notes for your reviewer**:
This adds additional state guards of  the idle_status method, which will
prevent it from being run until a worker has joined the relationship.
Previous invocations may have some messaging inconsistencies but will reach
eventual consistency once a worker has joined.

This prevents the polling loop from executing too soon, bloating the
installation time by bare-minimum an additional 10 minutes.

**Release note**:

```release-note
Added state guards to the idle_status messaging in the kubernetes-master charm to make deployment faster on initial deployment.
```