Change in xpack.{basic-feature}.enabled setting

In 8.0 all Basic-licensed features are enabled in the default distribution, there will not be any settings to disable them, and Stack and Solutions developers can rely on them being enabled. In 7.x we will deprecate the ability to set these settings, and in 8.0 we will remove these settings.

The following settings have been identified as basic license feature settings:

•xpack.enrich.enabled
•xpack.flattened.enabled
•xpack.ilm.enabled
•xpack.monitoring.enabled
•xpack.slm.enabled
•xpack.sql.enabled
•xpack.transform.enabled
•xpack.vectors.enabled

ref: elastic/elasticsearch#54745