Removes `testenv` annotations and related code. These annotations originally let you skip x-pack snippet tests in the docs. However, that's no longer possible.
Relates to #79309, #31619
Previously it was a requirement of the close job API that if the
job had an associated datafeed that that datafeed was stopped
before the job could be closed. Experience has shown that this
is just a pedantic nuisance. If a user closes the job without
first stopping the datafeed then it's just a mistake, and they
then have to make two further calls, to stop the datafeed and
then attempt to close the job again.
This PR changes the behaviour so that if you ask to close a job
whose datafeed is running then the datafeed gets stopped first
as part of the same call. Datafeeds are stopped with the same
level of force as the job close request specified.
The original comment mentioned issue #48583, but issue #48941
is specifically open for this mute. However, this is
inappropriate, as the underlying reason the test cannot be
unmuted is the same as for all the other tests skipped with the
comment "Kibana sample data": issues #51572, #51576 and #51678.
Closes#48941
