feat: support enable, labels, and annotations for selfservice-ui service

[bchrobot-mh]

Add support for enabled, labels, and annotations to the kratos-selfservice-ui-node Kubernetes Service.

Related Issue or Design Document

N/A

Checklist

• [x] I have read the contributing guidelines and signed the CLA.
• [ ] I have referenced an issue containing the design document if my change introduces a new feature.
• [x] I have read the security policy.
• [x] I confirm that this pull request does not address a security vulnerability. If this pull request addresses a security vulnerability, I confirm that I got approval (please contact security@ory.sh) from the maintainers to push the changes.
• [x] I have added tests that prove my fix is effective or that my feature works.
• [x] I have added the necessary documentation within the code base (if appropriate).

Further comments

This brings the features of this chart in line with other Ory Helm charts.

Local validation performed with:

helm template kratos-ui . -s templates/service.yaml
helm template kratos-ui . -s templates/service.yaml --set 'service.enabled=false'
helm template kratos-ui . -s templates/service.yaml --set 'service.labels.foo=bar'
helm template kratos-ui . -s templates/service.yaml --set 'service.annotations.foo=bar'

[CLAassistant]

All committers have signed the CLA.