✨ Add e2e tests

[cpanato]

What this PR does / why we need it:
Add e2e tests for cluster-api-provider-packet.
This PR setup the e2e and make it ready when we setup a PROW Job to run it

Followup: Add the conformance tests, it is running in another branch, using this one as base.

final logs of the test execution

Ran 2 of 2 Specs in 3199.965 seconds
SUCCESS! -- 2 Passed | 0 Failed | 0 Pending | 0 Skipped
PASS

Ginkgo ran 1 suite in 53m26.0287044s
Test Suite Passed
removing ssh key
2020/11/15 17:24:28 [DEBUG] DELETE https://api.equinix.com/metal/v1/ssh-keys/551cdb6c-8ec1-4733-a674-00435e73e211
SSH Key 551cdb6c-8ec1-4733-a674-00435e73e211 successfully deleted.
================ REDACTING LOGS ================
All sensitive variables are redacted

/assign @detiber @gianarb

special thanks to @rawkode for giving some credits to test/run the servers

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

[detiber]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, detiber

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