feat(getConfig): add vault credentials to already fetch secrets

[lekuehn]

Description

Using the getConfig step as part of the SAP/project-piper-action to retrieve the step configuration for an (enterprise) step:

    - name: Read step configuration
      uses: SAP/[email protected]
      with:
        step-name: getConfig
        flags: >-
          --stepName <my-step-name>
          --outputFile step-config.json

does not resolve vault credentials since the invocation of the Vault client within GetStepConfig (see here) will be skipped since the Vault credentials aren't set.
Usually, setting the Vault credentials is done within the PrepareConfig function within each _generated.go file but the getConfig step does not have such a file. Therefore, we need to add this logic here as well.

We are open for any discussions about other ways to achieve our goal. Feel free to reach out.

Checklist

• Tests
• Documentation
• Inner source library needs updating

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud