Update BREE for org.eclipse.test to Java 21

Required bundles of org.eclipse.test already require Java 21.

Author: HeikoKlare

eclipse.platform.releng/bundles/org.eclipse.test/.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>

eclipse.platform.releng/bundles/org.eclipse.test/.settings/org.eclipse.jdt.core.prefs

@@ -6,9 +6,9 @@ org.eclipse.jdt.core.compiler.annotation.nonnullbydefault=org.eclipse.jdt.annota
 org.eclipse.jdt.core.compiler.annotation.nullable=org.eclipse.jdt.annotation.Nullable
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-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
@@ -100,4 +100,4 @@ 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

eclipse.platform.releng/bundles/org.eclipse.test/META-INF/MANIFEST.MF

@@ -22,6 +22,6 @@ Import-Package: org.junit.jupiter.api;version="[5.14.0,6.0.0)",
  org.junit.platform.launcher;version="[1.14.0,2.0.0)",
  org.junit.platform.launcher.core;version="[1.14.0,2.0.0)"
 Bundle-ActivationPolicy: lazy
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Export-Package: org.eclipse.test
 Automatic-Module-Name: org.eclipse.test