In normal operation native controllers are not expected to write
anything to stdout or stderr.  However, if due to an error or
something unexpected with the environment a native controller
does write something to stdout or stderr then it will block if
nothing is reading that output.

This change makes the stdout and stderr of native controllers
reuse the same stdout and stderr as the Elasticsearch JVM (which
are by default redirected to es.stdout.log and es.stderr.log) so
that if something unexpected is written to native controller
output then:

1. The native controller process does not block, waiting for
   something to read the output
2. We can see what the output was, making it easier to debug
   obscure environmental problems

Backport of elastic#56491