[6.13.z] - remove the all nailgun imports from UI folder

[omkarkhatavkar]

Problem Statement

We are using the direct imports from the nailgun rather than directly using from target_sat

Solution

Direct Imports Removed: We've cleaned up our codebase by eliminating direct imports from the Nailgun package.

Using target_sat, module_target_sat, class_target_sat: Modified the API calls and using the target_sat.api. pattern for all API calls.

[omkarkhatavkar]

trigger: test-robottelo pytest: tests/foreman/ui/ -m e2e

[Satellite-QE]

PRT Result

Build Number: 6100
Build Status: UNSTABLE
PRT Comment: pytest tests/foreman/ui/ -m e2e --external-logging
Test Result : = 2 failed, 12 passed, 777 deselected, 908 warnings, 10 errors in 6101.76s (1:41:41) =

[Gauravtalreja1]

trigger: test-robottelo pytest: tests/foreman/ui/

[Satellite-QE]

PRT Result

Build Number: 6174
Build Status: UNSTABLE
PRT Comment: pytest tests/foreman/ui/ --external-logging
Test Result : = 203 failed, 433 passed, 23 skipped, 57 deselected, 11995 warnings, 88 errors in 94713.20s (1 day, 2:18:33) =

[Gauravtalreja1]

@omkarkhatavkar Could you rebase and update this PR?

[omkarkhatavkar]

@Gauravtalreja1 @jyejare Rebase Done !

[Gauravtalreja1]

@omkarkhatavkar Could you rebase this PR again?

[omkarkhatavkar]

@Gauravtalreja1 @Gauravtalreja1 @pondrejk can we merge this ?

[pnovotny]

ACK