[ML] Remove usage of base action logger in ml actions #50236
Merged
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Backport of #50074
The default log4j configuration sets the log level to debug for the org.elasticsearch.action package, any transport actions that use the logger in the base class TransportAction will log at this level. Create a logger in the ml actions where required, using the base logger is deprecated anyway so this change removes a few warnings.
Also changed the naming from LOGGER to the more typical logger