feat: add ability to fetch only specific resources by name

[simonsystem]

This introduces a new environment variable RESOURCE_NAME which can be used, to configure specific resources being fetched by name.

RESOURCE_NAME can be a comma-separated list of resources, resource-type-prefixed resources or namespace-prefixed resources. E.g. resource-name,secret/resource-name,namespace/secret/resource-name

Closes #378

[ChristianGeie]

thx for contributing this awesome feature. it's also possible for you to implement testing the feature using sidecar-pythonscript-resource-name in github workflow?

[simonsystem]

@ChristianGeie Added the github workflows. Tell me, if something is still missing.

[CarstenSon]

Hey @ChristianGeie :)

is something else needed for this PR to be accepted? Our team is also happily awaiting this feature and in case something is needed i'd love to help out with that!

[ChristianGeie]

Hi @CarstenSon , thx for your work.

I canceled the github workflow (see https://github.com/kiwigrid/k8s-sidecar/actions/runs/12430846663) after half an hour, so the test was not successful. Please take another look at this, it doesn't seem to be working properly yet.

If all tests are green, I can also merge your PR.

[simonsystem]

@ChristianGeie @CarstenSon Fixed it! Workflow finnished successfully on my side. Would be nice, to see it merged. 🚀

[ChristianGeie]

lgtm

[simonsystem]

Thank you everyone! 😃