Rename Preload attribute to LoadableDescriptors

[theresa-m]

Fixes: #19611

I tried to split commits as follows for easier reviewing:

1. Test changes
2. VM logic changes
3. VM renaming and formatting

[keithc-ca]

Please address the line endings check failure.

[keithc-ca]

Jenkins test sanity aarch64_linux,aarch64_linux_vt_standard jdknext

[keithc-ca]

Updates are required to https://github.com/ibmruntimes/openj9-openjdk-jdk.valuetypes before that repository will compile with the current content of https://github.com/eclipse-openj9/openj9:

[2024-10-17T16:51:51.110Z] /home/jenkins/workspace/Build_JDKnext_aarch64_linux_vt_standard_Personal/build/linux-aarch64-server-release/support/j9jcl/jdk.management/share/classes/com/ibm/lang/management/internal/PlatformMBeanProvider.java:40: error: cannot find symbol
[2024-10-17T16:51:51.110Z] import com.sun.management.internal.VirtualThreadSchedulerImpls;
[2024-10-17T16:51:51.110Z]                                   ^
[2024-10-17T16:51:51.110Z]   symbol:   class VirtualThreadSchedulerImpls
[2024-10-17T16:51:51.110Z]   location: package com.sun.management.internal
[2024-10-17T16:51:51.110Z] /home/jenkins/workspace/Build_JDKnext_aarch64_linux_vt_standard_Personal/build/linux-aarch64-server-release/support/j9jcl/jdk.management/share/classes/com/ibm/lang/management/internal/PlatformMBeanProvider.java:41: error: package jdk.management does not exist
[2024-10-17T16:51:51.110Z] import jdk.management.VirtualThreadSchedulerMXBean;
[2024-10-17T16:51:51.110Z]                      ^
[2024-10-17T16:51:51.110Z] /home/jenkins/workspace/Build_JDKnext_aarch64_linux_vt_standard_Personal/build/linux-aarch64-server-release/support/j9jcl/jdk.management/share/classes/com/ibm/lang/management/internal/PlatformMBeanProvider.java:114: error: cannot find symbol
[2024-10-17T16:51:51.110Z] 			.addInterface(VirtualThreadSchedulerMXBean.class)
[2024-10-17T16:51:51.110Z] 			              ^
[2024-10-17T16:51:51.110Z]   symbol:   class VirtualThreadSchedulerMXBean
[2024-10-17T16:51:51.110Z]   location: class PlatformMBeanProvider
[2024-10-17T16:51:51.110Z] /home/jenkins/workspace/Build_JDKnext_aarch64_linux_vt_standard_Personal/build/linux-aarch64-server-release/support/j9jcl/jdk.management/share/classes/com/ibm/lang/management/internal/PlatformMBeanProvider.java:113: error: cannot find symbol
[2024-10-17T16:51:51.110Z] 		ComponentBuilder.create("jdk.management:type=VirtualThreadScheduler", VirtualThreadSchedulerImpls.create()) //$NON-NLS-1$
[2024-10-17T16:51:51.110Z] 		                                                                      ^
[2024-10-17T16:51:51.110Z]   symbol:   variable VirtualThreadSchedulerImpls
[2024-10-17T16:51:51.110Z]   location: class PlatformMBeanProvider
[2024-10-17T16:51:51.110Z] 4 errors

[keithc-ca]

I created #20377 which should unblock this.

[pshipton]

Jenkins test sanity aarch64_linux_vt_standard jdknext

[keithc-ca]

There are many failures like this:

FAILED CONFIGURATION: @BeforeMethod setUp
java.lang.InternalError: java.lang.IllegalAccessException: static final field has no write access: jdk.internal.misc.Unsafe.theUnsafe/jdk.internal.misc.Unsafe/putStatic, from class java.lang.Object (module java.base)
	at java.base/jdk.internal.reflect.MethodHandleAccessorFactory.newFieldAccessor(MethodHandleAccessorFactory.java:207)
	at java.base/jdk.internal.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:144)
	at java.base/java.lang.reflect.Field.acquireOverrideFieldAccessor(Field.java:1212)
	at java.base/java.lang.reflect.Field.getOverrideFieldAccessor(Field.java:1181)
	at java.base/java.lang.reflect.Field.get(Field.java:454)
	at org.openj9.test.unsafe.UnsafeTestBase.getUnsafeInstance(UnsafeTestBase.java:120)
	at org.openj9.test.unsafe.UnsafeTestBase.setUp(UnsafeTestBase.java:562)
	[...]
Caused by: java.lang.IllegalAccessException: static final field has no write access: jdk.internal.misc.Unsafe.theUnsafe/jdk.internal.misc.Unsafe/putStatic, from class java.lang.Object (module java.base)
	at java.base/java.lang.invoke.MemberName.makeAccessException(MemberName.java:913)
	at java.base/java.lang.invoke.MethodHandles$Lookup.unreflectField(MethodHandles.java:3608)
	at java.base/java.lang.invoke.MethodHandles$Lookup.unreflectSetter(MethodHandles.java:3599)
	at java.base/java.lang.invoke.MethodHandleImpl$1.unreflectField(MethodHandleImpl.java:1621)
	at java.base/jdk.internal.reflect.MethodHandleAccessorFactory.newFieldAccessor(MethodHandleAccessorFactory.java:185)
	... 31 more

[theresa-m]

Those failures are related to #20372