skip tiering creation for namespace buckets

[dannyzaken]

Signed-off-by: Danny Zaken dannyzaken@gmail.com

related to noobaa/noobaa-operator#686

Explain the changes

1. in create_bucket if the created bucket is a namespace bucket, skip the tiering\tier creation

Issues: Fixed #xxx / Gap #xxx

1. fix for https://bugzilla.redhat.com/show_bug.cgi?id=1981331

Testing Instructions:

[guymguym]

@dannyzaken This makes cache buckets unusable - their policy requires both namespace and tiering.

Why is this change needed??

[dannyzaken]

@guymguym, you're right. changed to include cache bucket.

this is needed since this is failing creation of NS (non-cache) buckets in OCS, where the internal storage is disabled. the create_bucket fails on validate_pool_constraints. a previous fix was done in the operator by sending the default bucket class policy as the tiering policy, but it then causes OBC provision to fail if the defaultBucketClass is not ready (see noobaa/noobaa-operator#686)