Ensure specific release instead of 21.latest

[borkdude]

I'd like to download specific releases of Oracle GraalVM 21, like 21.0.0 and not get the 21 latest automatically.

As discussed on Slack with @fniephaus:

good question, I don’t think you can at the moment. the logic is here and does not take into GA releases account. Can you file a ticket so we can look into it?

[fniephaus]

The script-friendly URL are unfortunately a bit awkward with the regard to GA vs latest releases:

• https://download.oracle.com/java/latest/jdk-_linux-x64_bin.tar.gz links to the latest version
• https://download.oracle.com/java/archive/jdk-_linux-x64_bin.tar.gz links to the GA version

I'm proposing to work around this by putting the following special handling for GA versions in place:

• java-version: '21' will continue to use latest for the latest version
• java-version: '21.0.0' will use archive for the GA version

Does this makes sense to you?

[borkdude]

Sounds like a good solution to me!