Clear and concise description of the problem

Services always run, even if the pipeline fails before a step runs that needs the service

Suggested solution

Add a parameter like steps: [ s1, s2 ] to services that allows to control for which steps services must start.
Don't start the step before it is clear that the assigned steps will run, and shut it down after the steps has finished.

Alternative

No response

Additional context

No response

Validations

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