CLI APIs should log more helpful error messages on NoClassDefFoundError

[lukaseder]

When using the ParserCLI or some other CLI API in jOOQ, there may be a NoClassDefFoundError, because of a missing API dependency. We currently have 2 such dependencies in jOOQ 3.15:

• reactive streams
• r2dbc

The ZIP file from the website ships with these dependencies, but users may not have taken an example from the right page of the manual. While this could be made a lot easier by creating a single jar file "assembly" or by offering shell scripts (#11771), we can still also add some troubleshooting help via a better error message.

[lukaseder]

Fixed in jOOQ 3.15.0 and 3.14.12 (#11933)