scylla/3.11.x: fix ShardAwarenessTest for Scylla 2025.1

Two Scylla 2025.1 changes break correctShardInTracingTest:

1. Tablets enabled by default for NTS keyspaces make the driver's
   hash-based getShardId() prediction non-deterministic, so the
   hardcoded expected shards ("shard 0" / "shard 1") become
   unreliable.  Fix: ADD TABLETS = {'enabled': false} to the CREATE
   KEYSPACE statement to restore traditional token-based shard
   assignment.

2. A new coordinator-side trace event runs on shard 0 regardless of
   the data shard, causing the previous per-event assertion to fail.
   Fix: only assert the shard for events whose description contains
   "querying locally" (the data-local event).

Also:
- Thread names now include a /sl:<service_level> suffix (e.g.
  "shard 0/sl:default").  Strip it before the startsWith() comparison.
- assertThat(anyLocal) was a no-op BooleanAssert (never called
  .isTrue()).  Replace with assertTrue(anyLocal) so the liveness
  guard actually fires.

Author: nikagra

driver-core/src/test/java/com/datastax/driver/core/ShardAwarenessTest.java

@@ -82,20 +82,25 @@ private void verifyCorrectShardSingleRow(String pk, String ck, String v, String
           event.getSource(),
           event.getThreadName(),
           event.getDescription());
-      assertThat(event.getThreadName()).startsWith(shard);
+      // Only data-local events carry the owning shard. Scylla 2025.1 adds coordinator-side
+      // events that legitimately run on shard 0 regardless of the data shard. Also, since
+      // Scylla 2025.1 the thread name carries a service-level suffix ("shard N/sl:<level>"),
+      // so strip it before comparing.
       if (event.getDescription().contains("querying locally")) {
         anyLocal = true;
+        String normalized = event.getThreadName().replaceFirst("/sl:[^/]*$", "");
+        assertThat(normalized).startsWith(shard);
       }
     }
-    assertThat(anyLocal);
+    assertTrue("No 'querying locally' trace event was observed for the query", anyLocal);
   }
 
   @Test(groups = "short")
   public void correctShardInTracingTest() {
     session().execute("DROP KEYSPACE IF EXISTS shardawaretest");
     session()
         .execute(
-            "CREATE KEYSPACE shardawaretest WITH replication = {'class': 'NetworkTopologyStrategy', 'datacenter1': '3'}");
+            "CREATE KEYSPACE shardawaretest WITH replication = {'class': 'NetworkTopologyStrategy', 'datacenter1': '3'} AND TABLETS = {'enabled': false}");
     session()
         .execute("CREATE TABLE shardawaretest.t (pk text, ck text, v text, PRIMARY KEY (pk, ck))");