chore: add pint

[rexagod]

Continues #838.

[rexagod]

Test run: https://github.com/kubernetes-monitoring/kubernetes-mixin/actions/runs/9982477680/job/27588267056?pr=958#step:4:56. LMK if this looks good and I'll send a patch fixing it.

[povilasv]

LGTM, but some merge conflicts / failing ci 👍

[povilasv]

I wonder why this change?

[rexagod]

Pint suggested a refactor here.

┌[rexagod@nebuchadnezzar] [/dev/ttys000] [pint ⚡] [2]
└[~/repositories/oss/kubernetes-mixin]> make pint-lint 

prometheus_alerts.yaml:106-123 Warning: Aggregation using `without()` can be fragile when used inside binary expression because both sides must have identical sets of labels to produce any results, adding or removing labels to metrics used here can easily break the query, consider aggregating using `by()` to ensure consistent labels. (promql/fragile)
 106 |     "expr": |
 107 |       (
 108 |         max without (revision) (
 109 |           kube_statefulset_status_current_revision{job="kube-state-metrics"}
 110 |             unless
 111 |           kube_statefulset_status_update_revision{job="kube-state-metrics"}
 112 |         )
 113 |           *
 114 |         (
 115 |           kube_statefulset_replicas{job="kube-state-metrics"}
 116 |             !=
 117 |           kube_statefulset_status_replicas_updated{job="kube-state-metrics"}
 118 |         )
 119 |       )  and (
 120 |         changes(kube_statefulset_status_replicas_updated{job="kube-state-metrics"}[5m])
 121 |           ==
 122 |         0
 123 |       )
make: *** [pint-lint] Error 1