Enable Upstream Testing

[bryanculver]

• Updated Dockerfile to be compatible with upstream testing
• Added workflow fragment to trigger testing

Should close:

• 192

• 191

• 186

• 183

• 180

• 174

Outstanding Items:

• Pylint Failures
  • I think this should go in to unblock some of the dependency issues in #184, even if we fix all of the linting we're going to be blocked by Dolt test failures (see below)
• Unit Test Failtures
  • CI currently tests against the latest Dolt version but because it hasn't reached a 1.0 we going to continue experiencing flaky tests (see: https://github.com/nautobot/nautobot-plugin-version-control/actions/runs/4365451624/jobs/7634087633#step:7:768). Seems there have been some changes in Dolt that need to be accounted for. The changes in this PR are a net-improvement in getting the developer environment to build on more recent versions of Nautobot and Dolt

[bryanculver]

next is expected to fail because it goes to a new major version of Nautobot so can be safely ignored for now.