[jdk] Resolve EA OpenJDK builds to our JDK archive

[brianseeders]

See ES-12044

• Use our new GCS-based JDK archive for early access OpenJDK builds
• Add -Druntime.java.build=<build_number> to the test failure reproduction line when using an early access build

[elasticsearchmachine]

Pinging @elastic/es-delivery (Team:Delivery)

[rjernst]

LGTM

One nit: should we have a reverse proxy in front of the url so we aren't strongly tied to GCP?

[mark-vieira]

LGTM

One nit: should we have a reverse proxy in front of the url so we aren't strongly tied to GCP?

I don't even think we need that. We could just create a CNAME record for this.

[brianseeders]

Yep, just need a CNAME. I'll get one set up for it

[brianseeders]

Okay, it's using a custom domain now. The downside is that it's not using SSL/HTTPS. We can set that up, but it will cost more because it requires a load balancer (as well as being a more complex setup) or CDN. I think that a CDN that only caches the build artifact files (and not the JSON manifests I create) would be an effective solution, but I need to look at it some more. For now, this is fine and unblocks any other related work.