Deprecate cattle.io API Group

[puffitos]

Motivation

The cattle.io API group doesn't exist in any of our clusters anymore. The related resources to cluster monitoring (project-monitoring, the custom project owner role) use this apiGroup still, and this is the foundation stone for all of it go to away.

Changes

• Bumped to go1.23
• Bumped dependencies
• Added fallback logic for cattle.io review, in case the first one fails.
• Added golangci (must still do major cleanup here)

Tests done

Tested in staging with old & new project monitoring deployments. Both get their metrics federated via the prometheus /federate endpoint.

New project monitoring logs:

prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:46:25Z] GET - /federate
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:46:25Z] sending access review for namespace "caas-operations-monitoring"
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:46:25Z] searching for namespace "caas-operations-monitoring" in cache
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:46:25Z] raw federate[00000000670fdfd1 - 0] => {__name__=~".+"}
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:46:25Z] hjk federate[00000000670fdfd1 - 0] => {__name__=~".+",namespace=~"caas-eck-operator|caas-keda|caas-operations-monitoring|cattle-gatekeeper-system|cattle-project-caas-operations|cluster-autoscaler|cosignwebhook|crossplane-system|namespace-provisioner-system|navlinkswebhook|ranchertoicinga2|caasglobal"}

Old project monitoring logs:

prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:56:29Z] GET - /federate
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:56:29Z] sending access review for namespace "demoapp"
prometheus-rancher-monitoring-prometheus-0 prometheus-agent WARN[2024-10-16T15:56:29Z] namespace "demoapp" is still using the deprecated monitoring.cattle.io group
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:56:29Z] searching for namespace "demoapp" in cache
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:56:29Z] raw federate[00000000670fe22d - 0] => {__name__=~".+"}
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:56:29Z] hjk federate[00000000670fe22d - 0] => {__name__=~".+",namespace=~"demoapp|demoapp2|demoapp3|democluster|caasglobal"}
prometheus-rancher-monitoring-prometheus-0 prometheus-agent DEBU[2024-10-16T15:56:39Z] GET - /federate

[y-eight]

looks good to me (y)