HDDS-10084. Replace LEGACY in integration test with default layout from config

[adoroszlai]

What changes were proposed in this pull request?

Replace hard-coded BucketLayout.LEGACY with the configured default bucket layout:

ozone/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestDataUtil.java

Lines 142 to 145 in 48ea0bb

	public static OzoneBucket createVolumeAndBucket(OzoneClient client)
	throws IOException {
	return createVolumeAndBucket(client, BucketLayout.LEGACY);
	}

and similarly here:

ozone/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestDataUtil.java

Lines 52 to 55 in 48ea0bb

	public static OzoneBucket createVolumeAndBucket(OzoneClient client,
	String volumeName, String bucketName) throws IOException {
	return createVolumeAndBucket(client, volumeName, bucketName,
	BucketLayout.LEGACY);

Keep using LEGACY in two tests that fail with the default FILE_SYSTEM_OPTIMIZED layout.

https://issues.apache.org/jira/browse/HDDS-10084

How was this patch tested?

CI:
https://github.com/adoroszlai/ozone/actions/runs/7440054515

[SaketaChalamchala]

cc @SaketaChalamchala

[errose28]

Thanks @adoroszlai. Functionally LGTM. Maybe we want to add comments to that refer to the Jira(s) to fix the tests that are manually specifying LEGACY layout?

[adoroszlai]

Thanks @errose28 for reviewing and merging this.