Attach built JARs and Libraries to the release

[EricWittmann]

From discussion here:

• Running Apicurio Registry without docker #2519

@riprasad what do you think about updating our release workflow to attaching the various application variants (registry and tenant manager both) to the release as Assets?

[riprasad]

I think it's a fair thing to do. We are already packaging the runner jar and the lib folder as a single tar.gz file. We can definitely upload them as release assets.