Add option to set labels on pods

[m-wrzesien]

Added option to add custom labels to pod.

[m-wrzesien]

@tananaev and @tamcore
Can i ask for review please?

[tananaev]

I think you need to add a more detailed description on what this is for.

[m-wrzesien]

podLabels allows user to set arbitrary label on traccar pod.
This allows setting some custom labels.
As for the use case, some cluster operators have set of labels which they want to have on pods and this feature allows for that.

This pattern is used in many helm chart repositories:

• in prometheus-community/helm-charts repo:
• • Usage in template: https://github.com/prometheus-community/helm-charts/blob/956cd56510e737ed9112a0c79d67365af42fa513/charts/prometheus/templates/sts.yaml#L38
• • Values: https://github.com/prometheus-community/helm-charts/blob/956cd56510e737ed9112a0c79d67365af42fa513/charts/prometheus/values.yaml#L554
• In bitnami/charts repo:
• • Usage in template: https://github.com/bitnami/charts/blob/main/bitnami/mysql/templates/primary/statefulset.yaml#L36
• • Values: https://github.com/bitnami/charts/blob/main/bitnami/mysql/values.yaml#L612

[m-wrzesien]

@tananaev
I've added comment with description.
If you have a time, please take a look at it.

By the way, should i mention you or anyone else if I made any changes/add a new comment to PR?

[tananaev]

Thanks for adding the description, but I don't think I'm qualified enough to review this. So let's wait for others.