[`Setting.versionSetting`](https://github.com/elastic/elasticsearch/blob/0652a5915586abbcdfdfffa91a391740f0147752/server/src/main/java/org/elasticsearch/common/settings/Setting.java#L1275) (only used by index compatibility setting) does not use the `Validator` passed in - its just discarded. Looks like it's been like this since it was introduced by https://github.com/elastic/elasticsearch/pull/83264 in 8.2.0.

Enabling this causes some tests to fail. Enabling this may cause problems for indexes that have a wonky setting already applied.
server/src/test/java/org/elasticsearch/cluster/coordination/NodeJoinExecutorTests.java
Metadata.builder()
                    .coordinationMetadata(CoordinationMetadata.builder().term(randomLongBetween(0L, executorTerm)).build())
                    .build()
            )
            .build();
        assertThat(
            expectThrows(
                NotMasterException.class,
                () -> ClusterStateTaskExecutorUtils.executeHandlingResults(
                    clusterState,
                    executor,
                    List.of(JoinTask.singleNode(masterNode, TransportVersion.CURRENT, TEST_REASON, NOT_COMPLETED_LISTENER, executorTerm)),
                    t -> fail("should not succeed"),
                    (t, e) -> assertThat(e, instanceOf(NotMasterException.class))
                )
            ).getMessage(),
            containsString("not master for join request")
        );
    }
    public void testRemovesOlderNodeInstancesWhenBecomingMaster() throws Exception {
        final var allocationService = createAllocationService();
        final RerouteService rerouteService = (reason, priority, listener) -> listener.onResponse(null);
        final long executorTerm = randomLongBetween(1, Long.MAX_VALUE);
        final var executor = new NodeJoinExecutor(allocationService, rerouteService);
        final var masterNode = TestDiscoveryNode.create(UUIDs.randomBase64UUID(random()));
        final var otherNodeOld = TestDiscoveryNode.create(UUIDs.randomBase64UUID(random()));
        final var otherNodeNew = new DiscoveryNode(
            otherNodeOld.getName(),
            otherNodeOld.getId(),
            UUIDs.randomBase64UUID(random()),