Updates for CV component eval

[vsedmik]

Problem Statement

CV component eval proposes several changes to be done for content view tests.

Solution

This PR addresses some of them, mostly merges and some minor modifications. In particular:

1. test_positive_remove_cv_version_from_env is merged with test_positive_remove_cv_version_from_multi_env
2. test_positive_promote_with_docker_repo_composite is merged with test_positive_promote_multiple_with_docker_repo_composite
3. test_positive_add_custom_repo_by_name is parametrized for adding repo by id and incorrect BZ reference is removed
4. test_negative_update_with_name another test case where incorrect BZ reference is removed
5. test_positive_arbitrary_file_sync_over_capsule is removed since it is already implemented in test_positive_sync_file_repo
6. test_positive_restart_dynflow_publish and test_positive_restart_dynflow_promote are removed since they represent obsolete workflows nowadays

PRT test Cases example

trigger: test-robottelo pytest: tests/foreman/cli/test_contentview.py -k 'test_positive_add_custom_repo_by or test_positive_remove_cv_version_from_multi_env and not capsule'