RHOAIENG-5067: Model Serving Metrics: Use real namespace name instead of project display name in queries

[mturley]

Closes https://issues.redhat.com/browse/RHOAIENG-5067 (Critical)

Description

As identified by @christianvogt, the ProjectServerMetricsWrapper was passing the current project's display name into ModelServingMetricsProvider instead of the namespace name. This was making its way into the Prometheus query strings in the Model Serving Metrics page, causing 400 Bad Request errors.

How Has This Been Tested?

Created a model server in a project whose display name is different from its underlying namespace (e.g. it has capital letters or spaces in it). Tried to view the model server metrics (Projects -> [project] -> Models tab -> Kebab menu -> View model server metrics) and saw that before this change I got 400 errors in the dev tools Network tab and the loading spinners on the page never resolved. After this change the queries resolve correctly.

I also sent some requests to a deployed model with curl and observed that the metrics appear correctly on the page.

Test Impact

Request review criteria:

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• The developer has tested their solution on a cluster by using the image produced by the PR to main

[openshift-ci]

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