Adopt tests for C*2 (#9426)

versioned/storage/common-tests/src/main/java/org/projectnessie/versioned/storage/commontests/AbstractBasePersistTests.java

@@ -1473,7 +1473,7 @@ public void conditionalUpdate() throws Exception {
   }
 
   private void cassandraDeleteTombstoneSleep(long t) throws InterruptedException {
-    if ("Cassandra".equals(persist.name())) {
+    if (persist.name().startsWith("Cassandra")) {
       // MUST sleep here, otherwise the tombstone's timestamp might be equal to the INSERT's
       // timestamp of the storeObj() below, which would wrongly shadow the write's timestamp.
       long sleepMillis = t + 2 - System.currentTimeMillis();