Kubernetes backend silently discards backend_options errors

[meln5674]

Component

agent

Describe the bug

At this line https://github.com/woodpecker-ci/woodpecker/blob/v2.7.1/pipeline/backend/kubernetes/kubernetes.go#L229 there is no return err, meaning that any errors from parsing backend_options will be silently discarded.

Steps to reproduce

The following pipeline will demonstrate the issue

when:
  - event: push
  - event: manual

steps:
  - name: test
    image: alpine:3.13
    commands:
      - echo "Testing"
    backend_options:
      kubernetes:
        resources:
          requests:
            cpu: 1 # This should be a string, so it won't be set

Expected behavior

The error should be propagated back to the user, and the step should not run. Ideally such an error should be caught during initial pipeline validation.

System Info

{"source":"https://github.com/woodpecker-ci/woodpecker","version":"next-3ce20912cd"}

Additional context

No response

Validations

• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Checked that the bug isn't fixed in the next version already [https://woodpecker-ci.org/faq#which-version-of-woodpecker-should-i-use]