Properly replace MonetaryConfig

[keilw]

At the moment MonetaryConfig is marked as deprecated, but it is still used widely in Moneta.
Replace it and remove it with the next major version of the JSR.

[keilw]

We might use:

• Apache Commons Config 2: https://commons.apache.org/proper/commons-configuration/index.html
• Lightbend Config: https://github.com/lightbend/config
• Helidon Config: https://github.com/oracle/helidon/tree/master/config
  or something similar if a proper standard arises e.g. in Jakarta EE

[keilw]

Based on recent developments we'll use Jakarta Config for this as soon as a stable milestone or final version exists.