Skipping `transform` tests

[picandocodigo]

XPack YAML tests:

• transform/transforms_start_stop.yml - *. Failing in Ruby 2.x but not Ruby 3.x.
• transform/transforms_cat_apis.yml - Test cat transform stats hiding headers, failing in Ruby 2.x but not Ruby 3.x.
• transform/transforms_upgrade.yml - Test upgrade transform failing in all versions Error is:

[500] 
{ "error":
  {"root_cause":[
    {"type":"null_pointer_exception",
    "reason": 'Cannot invoke "org.elasticsearch.action.admin.indices.template.put.PutComposableIndexTemplateAction$Request.name()" because "templateRequest" is null'}
  ]

Need to debug to find out the cause.