As a user, I can recursively sync dependencies

[gerrod3]

Original Pulp Redmine Issue: https://pulp.plan.io/issues/139

Add new remote option to allow for dependency syncing when an allowlist is specified.

[maximiliankolb]

Hi all,

I am currently working on documentation within Foreman/Katello (tested on 3.7 with pulp_python 3.8.0) for python-type content and noticed that this feature is missing. Please consider my comment a "+1" because I imagine that it'd be a very useful feature from a user's perspective.

I've used "requests" from pypi.org as example & it has a couple of dependencies that I've installed manually before using --index-url _My_Foreman_Katello_FQDN_. I did not dare to leave "Includes" list empty.

shameless plug: PR in foreman-documentation: theforeman/foreman-documentation#2370

Update 2023-08-22: Documentation is now public: Managing Python Type Content