Build nightly with the JDK 23 release branch (24.1)

[jerboaa]

Partial fix for #749. This switches nightly builds to use the new mandrel/24.1 branch (currently broken). CI builds for 24.2 (JDK 24) to follow once adoptium/api.adoptium.net#1077 is resolved.

[jerboaa]

Mandrel build fails because we need a backport of oracle#9078 to be able to build with JDK 23+26 and better. PR for that in progress.

Edit: PR with the backport to 24.1 is here: #751

[jerboaa]

@zakkak Not sure if this is the right approach. Maybe we should keep nightly on graal/master and change to JDK 24? And then possibly adding JDK 23 based builds test to the weekly schedule. Thoughts?

[zakkak]

@zakkak Not sure if this is the right approach. Maybe we should keep nightly on graal/master and change to JDK 24? And then possibly adding JDK 23 based builds test to the weekly schedule. Thoughts?

Yes, that's the way we usually do it as we don't expect many changes on the release branch.

So we need to:

1. move the 23-based builds to the weekly pipeline
2. Create new issues for CI reporting (using @mandrel-bot) and use them in the corresponding jobs
3. update the jdk version in the nightly pipeline

[jerboaa]

@zakkak Not sure if this is the right approach. Maybe we should keep nightly on graal/master and change to JDK 24? And then possibly adding JDK 23 based builds test to the weekly schedule. Thoughts?

Yes, that's the way we usually do it as we don't expect many changes on the release branch.

OK.

2. Create new issues for CI reporting (using @mandrel-bot) and use them in the corresponding jobs

Any guidance as to how to do that?

[jerboaa]

Withdrawing this PR as we'll fix this with a different approach.

[zakkak]

Any guidance as to how to do that?

I open a new private window in firefox and login using the mandrel-bot credentials. You should have access to these through our shared vault (if not let me know in private).