[8.17] Add missing default ML query descriptions (#2917)

[lcawl]

Backport

This will backport the following commits from main to 8.17:

• Add missing default ML query descriptions (#2917)

Questions ?

Please refer to the Backport tool documentation

[github-actions]

Following you can find the validation results for the APIs you have changed.

API	Status	Request	Response
ml.put_data_frame_analytics	🟢	33/33	33/33
ml.put_datafeed	🔴	71/71	53/71
ml.put_job	🔴	227/227	223/225

You can validate these APIs yourself by using the make validate target.