CI: Check that the docker version in the metadata file has changed if any other files have changed in the connector folder

[bnchrch]

Overview

If any file has changed in a connector folder, ensure that the version has changed.

Solution

1. parse the local metadata.yml file
2. parse the remote metadata.yml file (github raw)
3. check if the dockerImageTag version is semver and has increased, (ignore in the prerelase version case 1.2.3-dev.asd213
4. if it has increased, pass, if not, fail

Extra considerations

Lets use this as a way to gate expensive tests.

So this check should be run early in the CI pipeline, if it fails then skip remaining tests.