[#68989754 #72170126] Use vcloud-login for tests

Use `vcloud-login` for tests, consolidate Jenkins scripts, and prevent logging of token.

This is extracted from the following commits:

- gds-operations/vcloud-core@290b65d043fe126f6917fe54a62362bd1ee059e2
- gds-operations/vcloud-core@9fd4c89811e3628505e690715485f8c17f50ff93
- gds-operations/vcloud-core@5c755ea2178b129b41079bf0957c3a0afba234f0