[ansible] Download cross-build jdk11u from CI

[luhenry]

We don't want to rely on openjdk-11-jdk from Ubuntu 20.04 repositories, it's based on Zero VM and just too slow for use as boot/build JDK.

Checklist

• commit message has one of the standard prefixes
• faq.md updated if appropriate
• other documentation is changed or added (if applicable)
• playbook changes run through VPC or QPC (if you have access)
• VPC/QPC not applicable for this PR
• for inventory.yml changes, bastillion/nagios/jenkins updated accordingly

[luhenry]

@sxa @andrew-m-leonard @Haroon-Khel @karianna could I please get a review? Thank you!

[sxa]

This is good for now, although we should likely switch to another method (e.g. pulling the Temurin early access builds) once we've started building regularly.

[luhenry]

@sxa once we have the regular builds on RISC-V, I'll make sure to start cleaning up all these little hacks that crept up as we were building support. That'll be one of these.

[karianna]

GH Action failures seem unrelated