Bump kind node images to latest

[phenixblue]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind bug

/kind cleanup

/kind deprecation
/kind design
/kind documentation
/kind feature

What this PR does / why we need it:

This PR moves our end-to-end CI workflow to use the KinD node Images.

Testing for k8s v1.20 is added and v1.16 is removed. The k8s v1.17, 1.18, and v1.19 images are all bumped to the latest supported fix release.

- k8s-version: v1.20
   kind-node-image: kindest/node:v1.20.2@sha256:8f7ea6e7642c0da54f04a7ee10431549c0257315b3a634f6ef2fecaaedb19bab
- k8s-version: v1.19
   kind-node-image: kindest/node:v1.19.7@sha256:a70639454e97a4b733f9d9b67e12c01f6b0297449d5b9cbbef87473458e26dca
- k8s-version: v1.18
   kind-node-image: kindest/node:v1.18.15@sha256:5c1b980c4d0e0e8e7eb9f36f7df525d079a96169c8a8f20d8bd108c0d0889cc4
- k8s-version: v1.17
   kind-node-image: kindest/node:v1.17.17@sha256:7b6369d27eee99c7a85c48ffd60e11412dc3f373658bc59b7f4d530b7056823e

Which issue(s) this PR fixes:

Fixes #76

Special notes for your reviewer:

Once this is merged we will need to remove the 1.16 versioned e2e check from being required and add the 1.20 check as required.

Does this PR introduce a user-facing change?:

NONE

Additional documentation e.g., usage docs, etc.:

[ilrudie]

/lgtm