Fixes #37865 - Add Multi environments to activation key info

[chris1984]

• Adds support for multi environment activation keys.
• Enabled a test we had skipped since Katello 4.5 that has been fixed for a long time

With PR with an ak that has multiple envs:

[vagrant@devel hammer-cli-katello]$ hammer activation-key info --id 36
Name:                           foo-env
Id:                             36
Host Limit:                     0 of Unlimited
Multi Content View Environment: yes
Organization:
 1) Id:   1
    Name: Default Organization
Content view environments:
 1) Content view:
        Id:                      2
        Name:                    Mixed
        Version:                 1.0
        Content view version Id: 2
        Composite:               no
    Lifecycle environment:
        Id:   1
        Name: Library
    Candlepin Name:        Library/Mixed
 2) Content view:
        Id:                      3
        Name:                    Animals
        Version:                 1.0
        Content view version Id: 3
        Composite:               no
    Lifecycle environment:
        Id:   2
        Name: Dev
    Candlepin Name:        Dev/Animals

AK with single env:

[vagrant@devel hammer-cli-katello]$ hammer activation-key info --id 35
Name:                           foo
Id:                             35
Host Limit:                     0 of Unlimited
Multi Content View Environment: no
Organization:
 1) Id:   1
    Name: Default Organization
Content view environments:
 1) Content view:
        Id:                      2
        Name:                    Mixed
        Version:                 1.0
        Content view version Id: 2
        Composite:               no
    Lifecycle environment:
        Id:   1
        Name: Library
    Candlepin Name:        Library/Mixed