feat(all projects): upgrade to java 21

[holmeso]

Description

It's time to update adamajava (AJ) to java 21 (it has been on 1.8 for a long time).
There are numerous advantages that the reader can easily find out for themselves.

The following changes were made to the AJ codebase to enable this change

• spotbugs updated to 5.2.1 (from 4.2.0)
• checkstyle updated to 10.12.4 (from 8.15)
• javax.xml.bind replaced by jakarta.xml.bind and MOXy (to be consistent with qcoverage - change jaxb jars to prepare for newer java versions #338)
• easymock updated to 5.2 ( from 3.1)
• scala plugin updated to 2.12.18 (from 2.12.3)

Type of change

Please delete options that are not relevant.

• This change requires a documentation update

How Has This Been Tested?

Existing unit tests have been updated to pass,

Are WDL Updates Required?

Yes. Once an AJ release is performed, any wdl wanting to take advantage of the new release will need to swap out all "module load java/1.8..." commands with the 21 equivalent

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[delocalizer]

Thanks for bringing us into the 2020s!