[Java] Disable flaky test testFloatSerialization (#1503)

This commit disables a flaky test
`CagraBuildAndSearchIT.testFloatSerialization`, to reduce churn in CI pipelines.

The test fails occasionally (e.g. with `tests.seed=42FC5CC6B4C6BA8E`), producing similar crashes to those listed in #1467.  The root cause is likely to be the same.

This test will be re-enabled once #1467 is resolved.

Authors:
  - MithunR (https://github.com/mythrocks)

Approvers:
  - Ben Frederickson (https://github.com/benfred)

URL: #1503

Author: mythrocks

java/cuvs-java/src/test/java/com/nvidia/cuvs/CagraBuildAndSearchIT.java

@@ -246,6 +246,7 @@ private void testIndexing(Supplier<CuVSMatrix> matrixFactory) throws Exception {
     }
   }
 
+  @Ignore // https://github.com/rapidsai/cuvs/issues/1467
   @Test
   public void testFloatSerialization() throws Throwable {
     testSerialization(