TPT-4432: Review and implement integration tests for ReservedIPs for IPv4 (#945)

* TPT-4277 Implement support for Reserved IP for IPv4

* Refactor existing tests for ReservedIPs

- replace hardcoded regions with getRegionsWithCaps
- skip tests that will fail on DevCloud

* Update fixtures for existing ReservedIPs tests

* Add assertions for ReservedIPs in existing tests

* Add assertions for ReservedIP Tags

* Add test for Tag with ReservedIP

* Linter & fixtures fixes

* Extend assertions in TestTag_CreateTagWithReservedIP

* Regenerate fixtures after merge with proj/reserved-ips

* Remove redundant unit tests added accidentally during rebase

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Co-authored-by: Michal Wojcik <miwojci@akamai.com>

Author: mawilk90