RFR: 8342988: GHA: Build JTReg in single step

[Aleksey Shipilev]

On Fri, 25 Oct 2024 14:53:33 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> Can we trust the cache that much? I mean, up to now it's only been a performance hack, now it will become a necessary part of the pipeline.

Yeah, I guess that's the risk. I can redo this to use the same upload/download-artifact we use to transfer bundles between build and test jobs. Probably next week.

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PR Comment: https://git.openjdk.org/jdk/pull/21692#issuecomment-2438097724