LUCENE-9662: CheckIndex should be concurrent - parallelizing index check across segments

gradle/validation/forbidden-apis.gradle

@@ -136,5 +136,15 @@ allprojects { prj ->
           'jdk-system-out'
       ]
     }
+
+    // the test-framework module is special in that its main sources are exported for all tests.
+    // include the test signature file (defaults.tests.txt) to the main sourceset.
+    if (prj.path in [
+        ":lucene:test-framework"
+    ]) {
+      forbiddenApisMain.signaturesFiles += files(
+          file("${resources}/defaults.tests.txt")
+      )
+    }
   })
 }

lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestManyPointsInOldIndex.java

@@ -70,7 +70,7 @@ public void testCheckOldIndex() throws IOException {
     dir.setCheckIndexOnClose(false);
 
     // ... because we check ourselves here:
-    TestUtil.checkIndex(dir, false, true, null);
+    TestUtil.checkIndex(dir, false, true, true, null);
     dir.close();
   }
 }