Add UTs for openshift prometheus on OCP 4.14

[nikita-bhatia]

Add more UTs for #1410

Added new cases :

1. test Autopilot install when user workload monitoring is not enabled
2. test Autopilot deployment and Secret after disabling and enabling autopilot
3. test Autopilot default provider URL on OCP 4.14

Existing cases covered :

1. test if user-workload can be enabled on non-openshift servers for AutoPilot
2. test if user-workload can be enabled on 4.14 version of openshift for AutoPilot
3. test if install can be enabled on 4.13 version of openshift for AutoPilot
4. test Autopilot install and Uninstall on ocp cluster 4.14
5. Disable prometheus on new install for OCP 4.14+, even if set by the user
6. Do not disable prometheus on existing install if set by the user