Add -Djava.security.manager=allow to SDK & Platform products

This avoids "Setting Security Manager is not supported" errors logged if
running ant related tooling on Java 21.

Fixes eclipse-platform/eclipse.platform#709

eclipse.platform.releng.tychoeclipsebuilder/eclipse.platform.repository/platform.product

@@ -9,7 +9,7 @@
    <launcherArgs>
       <programArgs>--launcher.defaultAction openFile --launcher.appendVmargs
       </programArgs>
-      <vmArgs>-Dosgi.requiredJavaVersion=17 -Dosgi.dataAreaRequiresExplicitInit=true -Dorg.eclipse.swt.graphics.Resource.reportNonDisposed=true -Xms40m -Xmx512m --add-modules=ALL-SYSTEM -Dorg.slf4j.simpleLogger.defaultLogLevel=off
+      <vmArgs>-Dosgi.requiredJavaVersion=17 -Dosgi.dataAreaRequiresExplicitInit=true -Dorg.eclipse.swt.graphics.Resource.reportNonDisposed=true -Xms40m -Xmx512m --add-modules=ALL-SYSTEM -Dorg.slf4j.simpleLogger.defaultLogLevel=off -Djava.security.manager=allow
       </vmArgs>
       <vmArgsMac>-Xdock:icon=../Resources/Eclipse.icns -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts
       </vmArgsMac>

eclipse.platform.releng.tychoeclipsebuilder/eclipse.platform.repository/sdk.product

@@ -9,7 +9,7 @@
    <launcherArgs>
       <programArgs>--launcher.defaultAction openFile  --launcher.appendVmargs
       </programArgs>
-      <vmArgs>-Dosgi.requiredJavaVersion=17 -Dosgi.dataAreaRequiresExplicitInit=true -Dorg.eclipse.swt.graphics.Resource.reportNonDisposed=true -Xms256m -Xmx2048m --add-modules=ALL-SYSTEM -Dorg.slf4j.simpleLogger.defaultLogLevel=off
+      <vmArgs>-Dosgi.requiredJavaVersion=17 -Dosgi.dataAreaRequiresExplicitInit=true -Dorg.eclipse.swt.graphics.Resource.reportNonDisposed=true -Xms256m -Xmx2048m --add-modules=ALL-SYSTEM -Dorg.slf4j.simpleLogger.defaultLogLevel=off -Djava.security.manager=allow
       </vmArgs>
       <vmArgsMac>-Xdock:icon=../Resources/Eclipse.icns -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts
       </vmArgsMac>