Description of problem:
When importing or exporting content from Satellite using hammer, the python tempfile library that is used is the /tmp folder in most cases. There is no mention that this /tmp directory would need to be of any specific size exporting or importing content into Satellite 6.

Version-Release number of selected component (if applicable):
python3-pulpcore-3.14.9-1.el7pc.noarch

How reproducible:
Every time

Steps to Reproduce:
1. Have a Satellite with a separate /tmp partition from /var/lib/pulp.
2. Sync a bunch of content on the Satellite under immediate sync policy and export it as a library export.
3. Import this into another organization and watch the decompression of the export tarball use the /tmp directory as its decompression folder

Actual results:
/tmp runs out of space in most cases because no recommendation/requirement is mentioned for this process. Also, no option to use as a tempdir is offered with hammer.

Expected results:
1. Set the tempdir location in (https://github.com/pulp/pulpcore/blob/d6f5d00ef47d1cdb00863339336d65f399b59ee7/pulpcore/app/tasks/importer.py#L118) to /var/lib/pulp where the largest available space would possibly be.

or

2. Allow the option to set the tempdir with the hammer content-import command

or

3. Note in the documentation that the /tmp directory will be used as the temporary decompression location for all content-import operations. Please make sure to have the available space on the server as required.

Additional info:
Opening the bugzilla with the source (pulp) to see if this default behavior for using tempfile with no location specified is what is wanted for the default. If not then perhaps having the option with hammer to set an env variable used by python tempfile library (TMPDIR, TEMP, TMP) could be set so that the location for a larger available location can be specified. If not this, then maybe a documentation change to call out /tmp as potentially needing a LOT of available space for this process.