Add commonLabels support to Helm Chart

[gaganhr94]

Description:
Currently, there's no way to apply custom labels across all resources created by the Harbor Gateway Helm chart. Users often need to add organisational labels (like owner, team, cost-center, etc.) to all Kubernetes resources for resource management, cost tracking, and governance purposes.

Proposal:
Add a new commonLabels field in the values.yaml of the helm chart. Update the _helpers.tpl and the YAML files accordingly to make use of the commonLabels. Values defined under this will add labels to all the kubernetes resources.

[gaganhr94]

If the contribution would add value, I would like to contribute this feature to the helm chart

[MinerYang]

Hi @gaganhr94 ,

Thanks for connecting with us. Understood your scenario, however we've already have config like pod labels for pod resources. To keep consistent and avoid conflict we will need handle this more carefully, and see if there's more requirement from community. Instead you could achieve this by adding some helm hook or fork at your own repository.

Best,
Miner