Add AWS Service functions to e2e test shared

[josh-ferrell]

/kind feature

Describe the solution you'd like
Add some basic CRUD functions for VPCs, subnets, NatGW, IGW, route tables, routes and peering connections to be used by the e2e test suite for building out infrastructure prior to test which will be used during airgapped testing as well.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Cluster-api-provider-aws version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[sedefsavas]

/triage accepted
/milestone v1.x
/priority backlog

[sedefsavas]

Thanks @josh-ferrell, this is a great step to test different topologies.

We have a few of these under test/e2e/suites/unmanaged/helpers_test.go.
We can move them to a shared folder with the new ones as well to be able to use them for EKS tests too.