Adjust setup related fixtures to the latest changes to noobaa-core

[sagihirshfeld]

Fixes:

• 27:

  Since we can bypass these restrictions when using sudo via ssh, but not via sftp - the workaround is to copy the file via sudo cp to an unrestricted directory and then use sftp to download it form there.

• 31:

  By modifying generate_random_key to create alphanumeric keys by default.

• 30:

  Fixed the race condition by using a new retry util func when we attempt to read the file from a newly set config directory

[sagihirshfeld]

Verified here:

2024-05-08 17:39:32  =========================== short test summary info ============================
2024-05-08 17:39:32  FAILED tests/test_health_operations.py::Test_health_operations::test_noobaa_account_flag[false_value] - noobaa_sa.exceptions.HealthStatusFailed: Health command failed to get all account info with flag --all_account_details False
2024-05-08 17:39:32  FAILED tests/test_health_operations.py::Test_health_operations::test_noobaa_account_flag[default_value] - noobaa_sa.exceptions.HealthStatusFailed: Health command failed to get all account info with flag --all_account_details None
2024-05-08 17:39:32  FAILED tests/test_health_operations.py::Test_health_operations::test_noobaa_bucket_flag[false_value] - noobaa_sa.exceptions.HealthStatusFailed: Health command failed to get all account info with flag --all_account_details False
2024-05-08 17:39:32  FAILED tests/test_health_operations.py::Test_health_operations::test_noobaa_bucket_flag[default_value] - noobaa_sa.exceptions.HealthStatusFailed: Health command failed to get all account info with flag --all_account_details None
2024-05-08 17:39:32  ============ 4 failed, 26 passed, 170 warnings in 87.45s (0:01:27) =============

The 4 remaining failures are due to issues/bugs that are specific to the Test_health_operations test cases - @udaysk23 FYI