JDK25 removes JavaLangAccess.virtualThreadDelayedTaskSchedulers()

[JasonFengJ9]

JDK25 removes JavaLangAccess.virtualThreadDelayedTaskSchedulers()

This fixes https://openj9-jenkins.osuosl.org/job/Build_JDKnext_aarch64_linux_OpenJDK/773/consoleFull

00:06:32  /home/jenkins/workspace/Build_JDKnext_aarch64_linux_OpenJDK/build/linux-aarch64-server-release/support/j9jcl/java.base/share/classes/java/lang/Access.java:610: error: method does not override or implement a method from a supertype
00:06:32  	@Override
00:06:32  	^
00:06:32  /home/jenkins/workspace/Build_JDKnext_aarch64_linux_OpenJDK/build/linux-aarch64-server-release/support/j9jcl/java.base/share/classes/java/lang/Access.java:612: error: cannot find symbol
00:06:32  		return VirtualThread.delayedTaskSchedulers();
00:06:32  		                    ^
00:06:32    symbol:   method delayedTaskSchedulers()

Signed-off-by: Jason Feng fengj@ca.ibm.com

[JasonFengJ9]

Local build hits a UnsatisfiedLinkError

* For target buildtools_create_symbols_javac__the.COMPILE_CREATE_SYMBOLS_batch:
Exception in thread "(unnamed thread)" java/lang/UnsatisfiedLinkError: jdk/internal/util/SystemProps$Raw.platformProperties()[Ljava/lang/String;
	at jdk/internal/util/SystemProps$Raw.<init> (java.base@24/SystemProps.java:263)
	at jdk/internal/util/SystemProps.initProperties (java.base@24/SystemProps.java:67)
	at java/lang/System.ensureProperties (java.base@24/System.java:398)
	at java/lang/System.afterClinitInitialization (java.base@24/System.java:227)
	at java/lang/Thread.initialize (java.base@24/Thread.java:2709)
	at java/lang/Thread.<init> (java.base@24/Thread.java:2773)

This will be addressed separately.

[keithc-ca]

I think this should wait until we have a complete collection of changes that allow building from the openj9-staging branch of the head stream (without resorting to using the new --disable-java-warnings-as-errors configure option) and the linkage error noted above is addressed.

[JasonFengJ9]

I think this should wait until we have a complete collection of changes that allow building from the openj9-staging branch of the head stream (without resorting to using the new --disable-java-warnings-as-errors configure option) and the linkage error noted above is addressed.

A successful build also depends on #20402

[keithc-ca]

#21623 updates the boot jdk for the head stream.

[keithc-ca]

Build succeeded when combined with ibmruntimes/openj9-openjdk-jdk#987.