Remove fake manifest from Robottelo

[synkd]

Problem Statement

Satellite QE would like to remove workflows and pipelines associated with the fake manifest from our AAP and Jenkins environments.

Solution

Remove references to and uses of the fake manifest from all Pytest fixtures, helper modules, utilities, and tests.

[synkd]

trigger: test-robottelo
pytest: tests/foreman/* -k 'test_negative_update_red_hat_repo or test_positive_able_to_disable_and_enable_rhel_repos or test_positive_ansible_job_timeout_to_kill or test_positive_ansible_job_privilege_escalation or test_positive_ansible_job_with_nonexisting_module or test_positive_ansible_job_on_host or test_positive_ansible_job_on_multiple_host or test_positive_ansible_localhost_on_host'

[JacobCallahan]

non-blocking alternative

Suggested change

	with (
	function_sca_manifest as manifest,
	open(temporary_local_manifest_path, 'wb') as file_handler,
	):
	file_handler.write(manifest.content)
	with function_sca_manifest as manifest:
	Path(temporary_local_manifest_path).write_bytes(manifest.content)