add all svgs to org.eclipse.jdt.ui bundles (eclipse-jdt#2174)

This commit adds SVGs for all icons in the bundles `eclipse.jdt.ui` and `eclipse.jdt.ui.unittest.junit` except for the following as these do not yet exist as SVG:

eclipse.jdt.ui/etool16/move_up.svg
eclipse.jdt.ui/wizban/newrecord_wiz.svg

Not all icons can be loaded via SVGs since some icons are made API via org.eclipse.jdt.ui.ISharedImages. There is a converter that was used for loading PNGs instead. I adjusted this converter so SVGs will be loaded:
`org.eclipse.jdt.internal.ui.JavaPluginImages.createImageDescriptor(Bundle, IPath, boolean)`

I did not change the functionality in `org.eclipse.jdt.internal.ui.viewsupport.ImagesOnFileSystemRegistry.getNewFile()` by changing `.png` to `.svg` as I don't know the side effects.

Author: Michael5601

org.eclipse.jdt.ui.unittest.junit/META-INF/MANIFEST.MF

@@ -28,3 +28,4 @@ Require-Bundle:
  org.eclipse.jdt.core.manipulation;bundle-version="1.9.0",
  org.eclipse.jdt.junit;bundle-version="3.14.0"
 Bundle-RequiredExecutionEnvironment: JavaSE-21
+Require-Capability: eclipse.swt;filter:="(image.format=svg)"

org.eclipse.jdt.ui.unittest.junit/icons/full/obj16/julaunch.svg

@@ -5,7 +5,7 @@
    <extension
          point="org.eclipse.debug.ui.launchConfigurationTypeImages">
       <launchConfigurationTypeImage
-            icon="$nl$/icons/full/obj16/julaunch.png"
+            icon="$nl$/icons/full/obj16/julaunch.svg"
             configTypeID="org.eclipse.jdt.ui.unittest.junit.launchConfiguration"
             id="org.eclipse.unittest.launchimage">
       </launchConfigurationTypeImage>
@@ -51,7 +51,7 @@
          point="org.eclipse.debug.ui.launchShortcuts">
       <shortcut
             label="%UnitTestShortcut.label"
-            icon="$nl$/icons/full/obj16/julaunch.png"
+            icon="$nl$/icons/full/obj16/julaunch.svg"
             helpContextId="org.eclipse.jdt.junit.launch_shortcut"
             class="org.eclipse.jdt.ui.unittest.junit.launcher.JUnitLaunchShortcut"
             modes="run, debug"

org.eclipse.jdt.ui.unittest.junit/icons/full/obj16/test.svg

@@ -145,7 +145,7 @@ public class JUnitLaunchConfigurationTab extends AbstractLaunchConfigurationTab
 
 	private Button fSearchButton;
 
-	private final Image fTestIcon = createImage("obj16/test.png"); //$NON-NLS-1$
+	private final Image fTestIcon = createImage("obj16/test.svg"); //$NON-NLS-1$
 
 	private String fOriginalTestMethodName;
 

org.eclipse.jdt.ui.unittest.junit/plugin.xml

@@ -122,3 +122,4 @@ Require-Bundle:
  org.eclipse.jdt.core.manipulation;bundle-version="[1.22.0,2.0.0)",
  org.eclipse.equinox.bidi;bundle-version="[0.10.0,2.0.0)"
 Bundle-RequiredExecutionEnvironment: JavaSE-21
+Require-Capability: eclipse.swt;filter:="(image.format=svg)"