feat: add labels to kube artifacts

[cmwylie19]

Description

This PR is a draft and discussion around adding labels to kube artifacts to distinguish what is what. For instance, I may want to get logs from only the watcher or admission pods without looking up the pod/deployment or uuid names. It also creates a method for scraping services using a ServiceMonitor's MatchLabel. This PR was created while writing documentation around scraping the Pepr services with Prometheus.

It also provides documentation how to scrape the Pepr services. Use this gist as a guide if needed

End Result:

┌─[cmwylie19@Cases-MacBook-Pro] - [~/pepr] - [2023-12-07 04:21:28]
└─[0] <git:(426 324b16f) > k get svc,po,deploy -n pepr-system  --show-labels     
NAME                               TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE     LABELS
service/pepr-static-test           ClusterIP   10.43.9.3      <none>        443/TCP   5m24s   pepr.dev/controller=admission
service/pepr-static-test-watcher   ClusterIP   10.43.75.252   <none>        443/TCP   5m24s   pepr.dev/controller=watcher

NAME                                            READY   STATUS    RESTARTS   AGE     LABELS
pod/pepr-static-test-b7f858d7-fsx5z             1/1     Running   0          5m24s   app=pepr-static-test,pepr.dev/controller=admission,pod-template-hash=b7f858d7
pod/pepr-static-test-b7f858d7-vr89k             1/1     Running   0          5m24s   app=pepr-static-test,pepr.dev/controller=admission,pod-template-hash=b7f858d7
pod/pepr-static-test-watcher-78647f6bbd-8jckv   1/1     Running   0          5m24s   app=pepr-static-test-watcher,pepr.dev/controller=watcher,pod-template-hash=78647f6bbd

NAME                                       READY   UP-TO-DATE   AVAILABLE   AGE     LABELS
deployment.apps/pepr-static-test           2/2     2            2           5m24s   app=pepr-static-test,pepr.dev/controller=admission
deployment.apps/pepr-static-test-watcher   1/1     1            1           5m24s   app=pepr-static-test-watcher,pepr.dev/controller=watcher

Related Issue

Fixes #426

Relates to #412

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Checklist before merging

• Test, docs, adr added or updated as needed
• Contributor Guide Steps followed

[netlify]

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[cmwylie19]

Examples:

┌─[cmwylie19@Cases-MacBook-Pro] - [~/pepr] - [2023-12-07 04:27:10]
└─[130] <git:(426 324b16f) > k logs -n pepr-system -l pepr.dev/controller=watcher -f --since 10s | jq 
{
  "level": 30,
  "time": 1701984435092,
  "pid": 16,
  "hostname": "pepr-static-test-watcher-78647f6bbd-8jckv",
  "method": "GET",
  "url": "/healthz",
  "status": 200,
  "duration": "1 ms"
}
{
  "level": 30,
  "time": 1701984435092,
  "pid": 16,
  "hostname": "pepr-static-test-watcher-78647f6bbd-8jckv",
  "method": "GET",
  "url": "/healthz",
  "status": 200,
  "duration": "0 ms"
}
{
  "level": 20,
  "time": 1701984437743,
  "pid": 16,
  "hostname": "pepr-static-test-watcher-78647f6bbd-8jckv",
  "apiVersion": "pepr.dev/v1",
  "kind": "PeprStore",
  "metadata": {
    "resourceVersion": "1344"
  },
  "msg": "Pepr Store update"
}