Description of problem:
When viewing a RHEL 6 or 7 content host's repository set from the Satellite WebUI, the repository list is empty due to a parameter in the call.

Version-Release number of selected component (if applicable):
satellite-6.13.4.1-1.el8sat.noarch

How reproducible:
Every time

Steps to Reproduce:
1. Register a RHEL 6 or 7 system to a Satellite
2. Navigate to the client's content host page and view the Content > Repository sets page
3.

Actual results:
The call that is made from the WebUI is:
        "request": {
          "method": "GET",
          "url": "https://bombsat613.d.sysmgmt.cee.redhat.com/katello/api/v2/repository_sets?content_access_mode_env=false&host_id=16&sort_by=name&sort_order=asc&per_page=20&page=1&search=",

and the response was:
{"total":0,"subtotal":0,"selectable":0,"page":"1","per_page":"20","error":null,"search":"","sort":{"by":"name","order":"asc"},"results":[]}

Expected results:
The call should include the parameter "content_access_mode_all=true" if defaulting to the "Show all" option upon page loading.

        "request": {
          "method": "GET",
          "url": "https://bombsat613.d.sysmgmt.cee.redhat.com/katello/api/v2/repository_sets?content_access_mode_env=false&content_access_mode_all=true&host_id=16&sort_by=name&sort_order=asc&per_page=20&page=1&search=",

<not including response because it's too large for case comment length>

Additional info: