Automatic merge from submit-queue (batch tested with PRs 51824, 50476, 52451, 52009, 52237)

Improve apiserver metrics reporting

Normalize "WATCHLIST" to "WATCH", add "scope" to the other metrics (listing 50k pods is != listing pods in a namespace), and add a new scope "resource" to cover individual resource calls.

This roughly aligns metrics with our ACL model (technically resource scope is GET, but POST to a subresource and POST to a namespace are not the same thing).

```release-note
WATCHLIST calls are now reported as WATCH verbs in prometheus for the apiserver_request_* series.  A new "scope" label is added to all apiserver_request_* values that is either 'cluster', 'resource', or 'namespace' depending on which level the query is performed at.
```