The following ILM tests all contain switch statements with branches that will never execute. The tests use a `between(x, y)` switch expression, but there are `case` values that are outside the randomised range. We need to fix these before #88739 can be merged. By "fix", I mean either remove the spurious cases, or if we actually want them, then extend the randomized range.

   * ActionConfigStatsTests
   * AllocateActionTests
   * CopyExecutionStateStepTests
   * RolloverActionTests
   * WaitForRolloverReadyStepTests

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/ilm/WaitForRolloverReadyStepTests.java
mockRolloverIndexCall(dataStreamName, step);
        SetOnce<Boolean> conditionsMet = new SetOnce<>();
        Metadata metadata = Metadata.builder()
            .put(indexMetadata, true)
            .put(DataStreamTestHelper.newInstance(dataStreamName, List.of(indexMetadata.getIndex())))
            .build();
        step.evaluateCondition(metadata, indexMetadata.getIndex(), new AsyncWaitStep.Listener() {
            @Override
            public void onResponse(boolean complete, ToXContentObject infomationContext) {
                conditionsMet.set(complete);
            }
            @Override
            public void onFailure(Exception e) {
                throw new AssertionError("Unexpected method call", e);
            }
        }, MASTER_TIMEOUT);
        assertEquals(true, conditionsMet.get());
        verify(client, Mockito.only()).admin();
        verify(adminClient, Mockito.only()).indices();
        verify(indicesClient, Mockito.only()).rolloverIndex(Mockito.any(), Mockito.any());
    }
    public void testSkipRolloverIfDataStreamIsAlreadyRolledOver() {
        String dataStreamName = "test-datastream";
        IndexMetadata firstGenerationIndex = IndexMetadata.builder(DataStream.getDefaultBackingIndexName(dataStreamName, 1))
            .settings(settings(Version.CURRENT))
            .numberOfShards(randomIntBetween(1, 5))
            .numberOfReplicas(randomIntBetween(0, 5))
            .build();
        IndexMetadata writeIndex = IndexMetadata.builder(DataStream.getDefaultBackingIndexName(dataStreamName, 2))
            .settings(settings(Version.CURRENT))