Feat: Add Ubuntu 20.04 agents

[eb-oss]

Signed-off-by: Eric Ball eball@linuxfoundation.org

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: https://github.com/edgexfoundry/ci-management/blob/master/.github/CONTRIBUTING.md

• [ ] Tests for the changes have been added (for bug fixes / features)

• [x] Added labels

  PR Type

  What kind of change does this PR introduce?

• [ ] Bugfix

• [x] Feature

• [ ] Code style update (formatting, local variables)

• [ ] Refactoring (no functional changes, no api changes)

• [ ] Documentation content changes

• [ ] Other... Please describe:

Issue Number:

Sandbox Testing

Test Links :

Are there any new imports or modules? If so, what are they used for and why?

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Other information

[eb-oss]

Once this is merged, these agents can be used by with their default labels (which is the pre-".cfg" part of the filename).