Move o.e.debug.tests to Java 21

Needed by
eclipse-platform/eclipse.platform.releng.aggregator#2739
Fixed deprecated usage of Thread.getId.

Author: akurtakov

debug/org.eclipse.debug.tests/.classpath

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21">
 		<attributes>
 			<attribute name="module" value="true"/>
 		</attributes>

debug/org.eclipse.debug.tests/.settings/org.eclipse.jdt.core.prefs

@@ -20,9 +20,9 @@ org.eclipse.jdt.core.compiler.annotation.nullable.secondary=
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=21
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -140,7 +140,7 @@ org.eclipse.jdt.core.compiler.problem.unusedTypeParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=21
 org.eclipse.jdt.core.compiler.taskCaseSensitive=enabled
 org.eclipse.jdt.core.compiler.taskPriorities=NORMAL,HIGH,NORMAL,HIGH,HIGH
 org.eclipse.jdt.core.compiler.taskTags=TODO,FIXME,XXX,EXPERIMENTAL,CONTEXTLAUNCHING

debug/org.eclipse.debug.tests/META-INF/MANIFEST.MF

@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.debug.tests;singleton:=true
-Bundle-Version: 3.14.400.qualifier
+Bundle-Version: 3.16.0.qualifier
 Bundle-Localization: plugin
 Require-Bundle: org.eclipse.ui;bundle-version="[3.6.0,4.0.0)",
  org.eclipse.core.runtime;bundle-version="[3.29.0,4.0.0)",
@@ -15,7 +15,7 @@ Require-Bundle: org.eclipse.ui;bundle-version="[3.6.0,4.0.0)",
  org.eclipse.jface.text;bundle-version="[3.5.0,4.0.0)",
  org.eclipse.ui.workbench.texteditor;bundle-version="[3.15.100,4.0.0)"
 Bundle-ActivationPolicy: lazy
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Bundle-Vendor: %providerName
 Export-Package: org.eclipse.debug.tests,
  org.eclipse.debug.tests.breakpoint,