Allow charms to remove node labels via config (#224)

[addyess]

Back ports #224 to release-1.32 branch

• Allow charms to remove node labels via config
• Linting mistake
• Update to tip of charm-lib-node-base

[github-actions]

license-eye has checked 136 files.

Valid	Invalid	Ignored	Fixed
0	66	70	0

Click to see the invalid file list

• charms/worker/build-snap-installation.sh
• charms/worker/charmcraft.yaml
• charms/worker/k8s/build-snap-installation.sh
• charms/worker/k8s/charmcraft.yaml
• charms/worker/k8s/scripts/rules-patches/core-alert-rules.patch
• charms/worker/k8s/scripts/update_alert_rules.py
• charms/worker/k8s/scripts/update_dashboards.py
• charms/worker/k8s/src/charm.py
• charms/worker/k8s/src/cloud_integration.py
• charms/worker/k8s/src/config/extra_args.py
• charms/worker/k8s/src/containerd.py
• charms/worker/k8s/src/cos_integration.py
• charms/worker/k8s/src/events/update_status.py
• charms/worker/k8s/src/inspector.py
• charms/worker/k8s/src/kube_control.py
• charms/worker/k8s/src/literals.py
• charms/worker/k8s/src/prometheus_alert_rules/kubePrometheus-prometheusRule.yaml
• charms/worker/k8s/src/prometheus_alert_rules/kubeStateMetrics-prometheusRule.yaml
• charms/worker/k8s/src/prometheus_alert_rules/kubernetesControlPlane-prometheusRule.yaml
• charms/worker/k8s/src/protocols.py
• charms/worker/k8s/src/reschedule.py
• charms/worker/k8s/src/snap.py
• charms/worker/k8s/src/token_distributor.py
• charms/worker/k8s/src/upgrade.py
• charms/worker/k8s/templates/cos_roles.yaml
• charms/worker/k8s/templates/ksm.yaml
• charms/worker/k8s/templates/snap_installation.yaml
• charms/worker/k8s/terraform/main.tf
• charms/worker/k8s/terraform/outputs.tf
• charms/worker/k8s/terraform/variables.tf
• charms/worker/k8s/terraform/versions.tf
• charms/worker/k8s/tests/unit/test_base.py
• charms/worker/k8s/tests/unit/test_cloud_integration.py
• charms/worker/k8s/tests/unit/test_config_options.py
• charms/worker/k8s/tests/unit/test_containerd.py
• charms/worker/k8s/tests/unit/test_inspector.py
• charms/worker/k8s/tests/unit/test_k8sd_api_manager.py
• charms/worker/k8s/tests/unit/test_reschedule.py
• charms/worker/k8s/tests/unit/test_snap.py
• charms/worker/k8s/tests/unit/test_token_distributor.py
• charms/worker/k8s/tests/unit/test_upgrade.py
• charms/worker/terraform/main.tf
• charms/worker/terraform/outputs.tf
• charms/worker/terraform/variables.tf
• charms/worker/terraform/versions.tf
• generate-src-docs.sh
• tests/integration/init.py
• tests/integration/conftest.py
• tests/integration/cos_substrate.py
• tests/integration/data/cos-offers-overlay.yaml
• tests/integration/data/k8s.profile
• tests/integration/data/microk8s.profile
• tests/integration/data/static-proxy-config.yaml
• tests/integration/data/test-bundle-ceph.yaml
• tests/integration/data/test-bundle-etcd.yaml
• tests/integration/data/test-bundle.yaml
• tests/integration/data/test_ceph/ceph-xfs-pvc.yaml
• tests/integration/data/test_ceph/pv-reader-pod.yaml
• tests/integration/data/test_ceph/pv-writer-pod.yaml
• tests/integration/grafana.py
• tests/integration/helpers.py
• tests/integration/prometheus.py
• tests/integration/test_ceph.py
• tests/integration/test_etcd.py
• tests/integration/test_k8s.py
• tests/integration/test_upgrade.py

Use this command to fix any missing license headers

```bash

docker run -it --rm -v $(pwd):/github/workspace apache/skywalking-eyes header fix

</details>

[github-actions]

Test coverage for f445879

coverage-report: install_deps /home/runner/work/k8s-operator/k8s-operator/charms/worker/k8s> python -I -m pip install 'coverage[toml]'
coverage-report: commands[0] /home/runner/work/k8s-operator/k8s-operator/charms/worker/k8s> coverage report
Name                                    Stmts   Miss  Cover
-----------------------------------------------------------
lib/charms/k8s/v0/k8sd_api_manager.py     278     29    90%
src/charm.py                              500    260    48%
src/cloud_integration.py                   80      3    96%
src/config/extra_args.py                   29      2    93%
src/containerd.py                         140     22    84%
src/cos_integration.py                     33     12    64%
src/events/update_status.py                68     24    65%
src/inspector.py                           41      4    90%
src/kube_control.py                        43     32    26%
src/literals.py                            23      0   100%
src/protocols.py                           28      5    82%
src/reschedule.py                          77      4    95%
src/snap.py                               193     30    84%
src/token_distributor.py                  181    109    40%
src/upgrade.py                            108     48    56%
-----------------------------------------------------------
TOTAL                                    1822    584    68%
coverage-report: OK (1.44=setup[1.19]+cmd[0.25] seconds)
congratulations :) (1.61 seconds)

Static code analysis report

Run started:2025-01-14 18:12:40.703509

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 3876
  Total lines skipped (#nosec): 3
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):