Remove org.hamcrest.core from Eclipse SDK

- The org.hamcrest.core bundle is just an empty hull to provide metadata
that redirects all references to it to the new org.hamcrest bundle that
avoids split packages with the org.hamcrest.library bundle by combining
all the content into a single bundle.
- Nothing in the SDK should require org.hamcrest.core anymore, so it can
be removed.
- A new org.junit bundle from Orbit is needed that requires the
org.hamcrest bundle instead of the org.hamcrest.core bundle.

eclipse-platform#2343

eclipse.platform.releng.prereqs.sdk/eclipse-sdk-prereqs.target

@@ -23,8 +23,10 @@
       <unit id="org.apache.xmlgraphics.source" version="2.9.0.v20230916-1600"/>
 
       <!-- needed because org.eclipse.jdt.feature.group  includes it, but it should include org.hamcrest (direct-from-maven) instead --> 
+      <!--
       <unit id="org.junit" version="4.13.2.v20230809-1000"/>
       <unit id="org.junit.source" version="4.13.2.v20230809-1000"/>
+      -->
 
       <unit id="org.apache.lucene.core" version="9.11.1.v20240628-1000"/>
       <unit id="org.apache.lucene.analysis-smartcn" version="9.11.1.v20240628-1000"/>
@@ -33,9 +35,6 @@
       <unit id="org.apache.lucene.analysis-smartcn.source" version="9.11.1.v20240628-1000"/>
       <unit id="org.apache.lucene.analysis-common.source" version="9.11.1.v20240628-1000"/>
 
-      <unit id="org.hamcrest.core" version="2.2.0.v20230809-1000"/>
-      <unit id="org.hamcrest.core.source" version="2.2.0.v20230809-1000"/>
-
       <!-- Transitive dependency of jxpath, not available as OSGi bundle on Maven Central -->
       <unit id="org.jdom" version="1.1.3.v20230812-1600"/>
       <unit id="org.jdom.source" version="1.1.3.v20230812-1600"/>
@@ -55,6 +54,13 @@
       <repository location="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/milestone/S202409180633"/>
     </location>
 
+    <!-- This is temporary to make progress on https://github.com/eclipse-platform/eclipse.platform.releng.aggregator/pull/2343 -->
+    <location includeAllPlatforms="true" includeMode="slicer" type="InstallableUnit">
+      <unit id="org.junit" version="4.13.2.v20240929-1000"/>
+      <unit id="org.junit.source" version="4.13.2.v20240929-1000"/>
+      <repository location="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/nightly/latest"/>
+    </location>
+
     <location includeAllPlatforms="true" includeMode="slicer" type="InstallableUnit">
        <!-- Check version in "<EMF>/features" directory -->
       <unit id="org.eclipse.emf.common.feature.group" version="2.33.0.v20240911-1027"/>

eclipse.platform.releng/bundles/org.eclipse.releng.tests/ignoreFiles.txt

@@ -107,6 +107,5 @@ about_cairo.html
 */plugins/org.apache.commons.codec_*
 */plugins/org.apache.commons.codec.source_*
 */plugins/org.apache.commons.httpclient.source_*
-*/plugins/org.hamcrest.core.source_*
 */eclipse/p2/org.eclipse.equinox.p2.metadata.repository/cache/content*_jar/content.xml
 */eclipse/artifacts.xml

eclipse.platform.releng/features/org.eclipse.sdk.tests/feature.xml

@@ -351,10 +351,6 @@
          id="org.eclipse.equinox.bidi.tests"
          version="0.0.0"/>
 
-   <plugin
-         id="org.hamcrest.core"
-         version="0.0.0"/>
-
    <plugin
          id="org.mockito.mockito-core"
          version="0.0.0"/>