Update versions of pipeline for 1.7

[afrittoli]

Changes

Update the LTS versions of pipeline under test and add 1.7

Submitter Checklist

These are the criteria that every PR should meet, please check them off as you
review them:

• Follows the authoring recommendations
• Includes docs (if user facing)
• Includes tests (for new tasks or changed functionality)
  • See the end-to-end testing documentation for guidance and CI details.
• Meets the Tekton contributor standards (including functionality, content, code)
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• Has a kind label. You can add one by adding a comment on this PR that
  contains /kind <type>. Valid types are bug, cleanup, design, documentation,
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• Complies with Catalog Organization TEP, see example. Note An issue has been filed to automate this validation

  • File path follows <kind>/<name>/<version>/name.yaml

  • Has README.md at <kind>/<name>/<version>/README.md

  • Has mandatory metadata.labels - app.kubernetes.io/version the same as the <version> of the resource

  • Has mandatory metadata.annotations tekton.dev/pipelines.minVersion

  • mandatory spec.description follows the convention

      ```
    
      spec:
        description: >-
          one line summary of the resource
    
          Paragraph(s) to describe the resource.
      ```
    

See the contribution guide for more details.

[vdemeester]

/lgtm

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