Raise Temurin Build Pass Rate to 95+%

[adamfarley]

Summary
Fix most of the issues preventing Temurin builds from completing successfully.

Success Metric
Short term: I intend to get a feel for the number of unhandled failures via the Failing Temurin jobs page.
Long term: I intend to gauge overall success via the "Adoptium Nightly Build Success" percentage on any two consecutive workdays.

Priorities

1. JDK20 builds on Core platforms.
2. JDK20 builds on Non-Core platforms.
3. JDK8, 11, and 17 builds on Core platforms.
4. JDK8, 11, and 17 builds on Non-Core platforms
   No priority: JDK (no version number) builds and any non-Temurin builds.

[adamfarley]

Current Failures:

Platform	JDK Version	Problem	Causal Issue	Related Issues
Mac Aarch64	JDK17	sign_installer failure because of issue with libosxui.dylib	None found yet, see related issue.	This issue may be blocking investigation. Look into resolving.
zLinux	JDK8	java.lang.UnsupportedClassVersionError: org/apache/tools/ant/launch/Launcher : Unsupported major.minor version 52.0	Likely cause
Solaris x64	JDK8	Encoded value errors, followed by "cannot find symbol SystemMetrics.instance"	Likely this
Solaris Sparcv9	JDK8	As above	As above

[adamfarley]

Weekly build pipeline results:

JDK Version	Number of builds	Number failed	Overall Percentage passed	Notes
JDK8	12	1	91.6%	The failure is Alpine. Issue already raised.
JDK11	11	0	100%
JDK17	11	2	83%	One test job failure, "Out of storage", no issue found. To be raised. The other failure seems to be while we're signing the installer. I don't have access.
JDK20	10	2	80%	One test failure due to SOOBE, issue already raised. The other failure seems to be the same "Out of storage" issue mentioned above.

So 5 failures total. 2 are machine-based storage issues, and can be ignored as those are typically a simple fix (but should still be raised), and one failure is a known test issue.

The only two failure that appears to be genuine build issues are:

• a Mac installer signing job that I can't access.
• and an Alpine issue that's already raised.

Next steps:

• Raise issue for "Out of storage" problem. - Done.
• Get access to mac installer signer job. - In progress.
• Find/create issue for it and link here.
• Declare that since only 2/44 of the build jobs failed with a vaguely build-related issue, (4.6%), that this issue is finished.

[adamfarley]

We are at 100% for now, and will endeavour to keep it that way via ongoing triage efforts, tracked in weekly triage issues.