Create ExternalSecret for PSR as part of Helm Chart that deploys Runner

[dwinchell]

Success Criteria:

• When I run our fork of the openshift-actions-runner-chart, it creates an ExternalSecret
  • https://github.com/ploigos/openshift-actions-runner-chart
• The ExternalSecret has all of the secret values needed by the helm chart (i.e. from GitHub Actions and the ones we pass in at the cli)
• After the ExternalSecret is created, the External Secrets Operator is able to successfully use it to create a secret (i.e. the ExternalSecret is "correct")
• Add secrets from GitHub Actions to generated-psr
• Mounted file is renamed to "psr-secrets.yml"