Add support for remote's includes/excludes in pull-through caching

[lubosmj]

As a random user, I can install any package from the referenced remote index through Pulp. It looks like pull-through distributions are ignoring includes/excludes fields from remotes. The documentation implies that this will work out of the box. Does this have any implications? Is this a feature yet to be implemented?

Steps to reproduce the behaviour in oci-env (domains enabled).

(venv3) [lmjachky@lmjachky-thinkpadt14gen4 services]$ pulp --profile local python remote create --name test --url https://pypi.org/ --includes '["shelf-reader"]'

{
  "pulp_href": "/pulp/default/api/v3/remotes/python/python/0190cbb3-e6b3-7271-a195-a5667aa931d6/",
  "pulp_created": "2024-07-19T15:54:43.252124Z",
  "pulp_last_updated": "2024-07-19T15:54:43.252136Z",
  "name": "test",
  "url": "https://pypi.org/",
  "ca_cert": null,
  "client_cert": null,
  "tls_validation": true,
  "proxy_url": null,
  "pulp_labels": {},
  "download_concurrency": null,
  "max_retries": null,
  "policy": "on_demand",
  "total_timeout": null,
  "connect_timeout": null,
  "sock_connect_timeout": null,
  "sock_read_timeout": null,
  "headers": null,
  "rate_limit": null,
  "hidden_fields": [
    {
      "name": "client_key",
      "is_set": false
    },
    {
      "name": "proxy_username",
      "is_set": false
    },
    {
      "name": "proxy_password",
      "is_set": false
    },
    {
      "name": "username",
      "is_set": false
    },
    {
      "name": "password",
      "is_set": false
    }
  ],
  "includes": [
    "shelf-reader"
  ],
  "excludes": [],
  "prereleases": true,
  "package_types": [],
  "keep_latest_packages": 0,
  "exclude_platforms": []
}

pulp --profile local python distribution create --name test --base-path test --remote test

Started background task /pulp/default/api/v3/tasks/0190cbb4-1f3b-788b-a620-656d36d591fe/
Done.
{
  "pulp_href": "/pulp/default/api/v3/distributions/python/pypi/0190cbb4-1fc1-76fe-a564-965771202cce/",
  "pulp_created": "2024-07-19T15:54:57.858495Z",
  "pulp_last_updated": "2024-07-19T15:54:57.858506Z",
  "base_path": "test",
  "base_url": "https://5d57a233243e/pypi/default/test/",
  "content_guard": null,
  "hidden": false,
  "pulp_labels": {},
  "name": "test",
  "repository": null,
  "publication": null,
  "allow_uploads": true,
  "remote": "/pulp/default/api/v3/remotes/python/python/0190cbb3-e6b3-7271-a195-a5667aa931d6/"
}

pip uninstall pytz

...
  Successfully uninstalled pytz-2024.1

pip --no-cache-dir install --trusted-host localhost:5001 -i http://localhost:5001/pypi/default/foo/simple/ pytz --no-build-isolation

...
Successfully installed pytz-2023.3

[gerrod3]

I'm not sure if our docs imply that remote filters will work with pull-through caching, but that does sound like how it should intuitively work. I think this is a good feature request.