Machine deployment metrics not available for user clusters.

[akash-gautam]

What happened?

In this PR, we exposed four metrics for machine deployment; however, in the seed MLA Prometheus, these metrics are available only for seed machine deployment & not for the user cluster's machine deployment.

Expected behavior

Machine deployment metrics are available for the seed and user clusters.

How to reproduce the issue?

1. Port forward to the Prometheus deployed in the user cluster namespace and check machine deployment metrics.
   

2. Check metrics on the seed Prometheus (metrics from the dedicated user cluster Prometheus are federated here); machine deployment metrics aren't available for user clusters.
   

How is your environment configured?

• KKP version: v2.27.4

Additional information

The configuration used to federate the metrics from the dedicated Prometheus of the user cluster into the seed MLA Prometheus needs to be updated to include machine deployment metrics.

Internal reference: 6511

[csengerszabo]

/label sig/cluster-management
/label customer-request
Internal reference: 6511

[csengerszabo]

/remove-label sig/cluster-management
/label sig/app-management

[iakmc]

/assign

[kron4eg]

/kind feature

[kron4eg]

/remove-kind bug