chore: removed packngo and used metal-go apis

[aayushrangwala]

fixes: #439

[ctreatma]

There should be a go.mod change here to pull in the new SDK instead of the old one.

Now that equinix-sdk-go exists, we should adopt that instead of metal-go.

[ctreatma]

@aayushrangwala The PR test workflow is failing with the error failed to enable BGP on project cd5ad69d-5460-46f8-8268-963262f2b8c2: undefined response type. Are you able to reproduce that failure locally?

[aayushrangwala]

@aayushrangwala The PR test workflow is failing with the error failed to enable BGP on project cd5ad69d-5460-46f8-8268-963262f2b8c2: undefined response type. Are you able to reproduce that failure locally?

@ctreatma Yes I am fixing the tests for the same. Previously there was packngo packetServer which was structured for tests/interfaces and accordingly the tests were written. Changing the structure to implement bare minimum test server and fixing tests

[aayushrangwala]

@ctreatma @displague Fixed all the tests. Please review and approve if looks good

[ctreatma]

The updated tests look great. I see a couple changes that look like they might not be necessary for the migration, but not sure about that. I don't have write access to this repo in any case, so we ultimately need @cprivitere to be included in the review process as well.

[cprivitere]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aayushrangwala, cprivitere

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[cprivitere]

/lgtm