[Java][CI]: Enable support for JDK21

[davisusanibar]

Describe the enhancement requested

Enable last Java release JDK21 support

Component(s)

Java

[danepitkin]

Hey @davisusanibar , is it okay if we close this issue in favor of #36994?

[davisusanibar]

Hi @danepitkin sure, let me update the title of the PR related.

[danepitkin]

Thank you!