Skip Pending Tests

[stevenjcumming]

Summary

The purpose of the PR is to reduce the noise in the CI Run Specs job.

• By default ignores skipped/pending tests
• add PENDING environment variable to show skipped/pending tets
• Allow the CI to skip pending tests
  • Pending tests don't prevent PR approval, so they could be skipped to save time.
• Update documentation to reflect PENDING environment variable changes

Related issue(s)

• https://github.com/department-of-veterans-affairs/va.gov-team/issues/83150

Testing done

• [x] Manual local testing

Acceptance criteria

• [x] Skipped/pending tests are ignored by default
• [x] When the PENDING flag is true, pending tests are NOT ignored.
• [x] Documentation is updated