DBZ-4113 Add new GH workflow for debezium-connect-rest-extension

[ani-sha]

https://issues.redhat.com/browse/DBZ-4113

[gunnarmorling]

That's interesting; why should the extension be built as part of all these workflows? I was rather thinking of having a new workflow, triggered by changes in this module and its dependences (BOM, parent, etc.), akin to the other module-specific workflows.

[ani-sha]

@gunnarmorling I thought it was a dependency for rest workflows. Created a new workflow.

[rk3rn3r]

Hey @ani-sha. My plan was to add some unit tests first with another PR for the extension and when I am on this I would've also created a test workflow. The REST extension isn't a connector so some of the applied triggers for this workflow might not be needed.
@gunnarmorling maybe I should do this with another task when adding tests next week?

[gunnarmorling]

I've pushed a commit for removing some of the paths which shouldn't be needed. Let's add the workflow now, so we have it in place when you add the tests and we can see whether they pass :)