Summary:
This metric was added as part of https://github.com/yugabyte/yugabyte-db/issues/22843. It will now be shown in the YSQL section, both regular and outlier table view.

The exact query looks like

```
sum(rate(rpc_latency_count{export_type="ysql_export", service_type="SQLProcessor", node_prefix="yb-admin-sanketh-aws-test-1", table_name=~"..*", server_type="yb_ysqlserver", service_method="CatalogCacheMisses"}[36s]))
```

Non-empty table name filter is needed because the metric is exported both at per-server & per-table level.

Test Plan:
Load metrics dashboard, sanity check.{F282343}

{F282344}

Reviewers: amalyshev, kfranz, myang, rmadhavan

Reviewed By: amalyshev, rmadhavan

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D37791