🐛 Create intermediate path for resources stored as files.

[jortel]

The java extension CR defines:

    resources:
    - fields:
      - key: maven.settings.path
        name: settings
        path: /shared/creds/maven/settings.xml
      selector: identity:kind=maven

/shared exists but creds/maven needs to be created on demand.

Reported by CI as:

 "errors": [
      {
        "severity": "Error",
        "description": "open /shared/creds/maven/settings.xml: no such file or directory"
      }
    ],