Bring CI and Dependencies up to date and synchronise opencmw-cpp changes

[wirew0rm]

This is a small maintainance commit, no new features, just keeping up with the rest of the world moving:

• CI: restyled switched from running their own infrastructure to running as a github action
• JDK language level: bump from 11 to 17, since 11 is not publicly supported any more.
• Dependencies: Bump all dependencies without breaking API changes
• non-functional small code improvements

The only functional change is removing the unused hash field in the opencmw YaS serialiser in accordance with (fair-acc/opencmw-cpp#318).

Next step is to follow up on #223 to ensure compatibility on the network level and adding a testcase that ensures compatibility between opencmw-cpp and opencmw-java.

[RalphSteinhagen]

Thanks for the update/fixes. Can be merged as is once the CI passes.

[wirew0rm]

Thanks for looking over this and the comments!

Network tests in the CI seem to be prone to timeout issues, which I locally cannot reproduce.

Maven Central deployment will also have to be fixed separately, looks like this might be an issue of expired deployment keys.