Add --allowed-packges to remotes to limit what references a remote can supply

[AbrilRBS]

Changelog: Feature: Add --allowed-packges to remotes to limit what references a remote can supply.
Docs: conan-io/docs#3534

[memsharded]

Looks good!

[franramirez688]

IMO, I think that --filter name is a bit confusing. It's being used in conan remote command, and it's filtering recipe references. I'd prefer to see another param name.

[AbrilRBS]

Let's talk with the team about what the best naming is, yeah :)

[czoido]

Let's talk with the team about what the best naming is, yeah :)

I think the name suggest that the packages added with --filter will be filtered out, but those are the ones that you can fetch from the remote, so I thin it may be better to use a name that suggests those packages are the ones allowed in the server. Something like --allowed, --allowed-packages, --allowed-patterns ? or any derivatives