[6.15.z] Add test coverage for BZ:2238952 and BZ:2025523

[Satellite-QE]

Cherrypick of PR: #15205

Problem Statement

Missing coverage for BZ:2238952 and BZ:2268544, where we verified Customize host button works to provision a discovered host with a few customizations.

Solution

Add test coverage for BZ:2238952 and BZ:2268544, to verify functionality of discovery provisioning with Customize host button with a few customizations, and also covering BZ:2025523 where we've validated the assigned Ansible roles to a HostGroup gets auto executed when host is provisioned.
Also, verifying new test and modifying existing test to validate if provisioning is sucessfull on new host UI instead of old UI

Related Issues

SatelliteQE/airgun#1397

[Satellite-QE]

trigger: test-robottelo
pytest: tests/foreman/ui/test_discoveredhost.py -k test_positive_custom_provision_pxe_host
provisioning: true
deploy_rhel_version: '9'
env:
     BROKER_SSH_BACKEND: hussh

[Gauravtalreja1]

trigger: test-robottelo
pytest: tests/foreman/ui/test_discoveredhost.py -k test_positive_custom_provision_pxe_host
provisioning: true
env:
     BROKER_SSH_BACKEND: hussh

[Satellite-QE]

PRT Result

Build Number: 7446
Build Status: UNSTABLE
PRT Comment: pytest tests/foreman/ui/test_discoveredhost.py -k test_positive_custom_provision_pxe_host --external-logging --include-onprem-provisioning
Test Result : ========== 2 failed, 7 deselected, 173 warnings in 4531.92s (1:15:31) ==========

[Satellite-QE]

PRT Result

Build Number: 7453
Build Status: UNSTABLE
PRT Comment: pytest tests/foreman/ui/test_discoveredhost.py -k test_positive_custom_provision_pxe_host --external-logging --include-onprem-provisioning
Test Result : ========== 2 failed, 7 deselected, 228 warnings in 5617.91s (1:33:37) ==========

[Satellite-QE]

PRT Result

Build Number: 7456
Build Status: UNSTABLE
PRT Comment: pytest tests/foreman/ui/test_discoveredhost.py -k test_positive_custom_provision_pxe_host --external-logging --include-onprem-provisioning
Test Result : ========== 2 failed, 7 deselected, 266 warnings in 6459.28s (1:47:39) ==========

[Gauravtalreja1]

PRT is expected to fail here due to hussh issue with discovery tests, we can merge this PR and handle the failure in separately with other discovery tests

[shubhamsg199]

Ack