add v1alpha2 config version

[fabriziopandini]

This PR adds v1alpha2 config version.

v1alpha2 currently is copy/paste from v1alpha1, but in following PRs it will be modified for supporting multi node as defined #130.

Fuzzer tests were added to make sure conversion works.
Ending test for the new version were added as well

Note for reviewers
To make everyhing work it was necessary to update some dependencies, and this accounts the size of the PR 😭(all deps are in a separated commit) :

• k8s.io/apimachinery and k8s.io/code-generator now are both from master branch (before k8s.io/code-generator was pinned to release-v1.11)
• vendored k8s.io/apimachinery, k8s.io/code-generator and k8s.io/gengo where updated to get a consistent set of dependencies after the switch to klog

[neolit123]

thanks @fabriziopandini
LGTM on a quick pass.

-verify needs hack/update-deps.sh.

[tao12345666333]

LGTM. I ignored the code generated by conversion-gen. 👍

[fabriziopandini]

Updated 2nd commits only (gopkg +external dependencies) to pass verify

[alejandrox1]

/test pull-kind-conformance-parallel

[fabriziopandini]

/test pull-kind-conformance-parallel

[fabriziopandini]

/test pull-kind-conformance-parallel

[fabriziopandini]

@BenTheElder failures in conformance test IMO are unrelated to this PR.
How can I get around this?

[alejandrox1]

/retest

[BenTheElder]

Kubernetes master is broken currently (CNI version mismatch) kubernetes/kubernetes#71629 to fix.

Will loop back around to kind PRs after sorting upstream.

[BenTheElder]

/retest

[munnerz]

This looks good to me, and is now passing tests too 😄

/lgtm

[BenTheElder]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BenTheElder, fabriziopandini

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[BenTheElder]

/retest

[BenTheElder]

This got flakier in recent releases too:

I1206 03:08:40.329] Summarizing 1 Failure:
I1206 03:08:40.329] 
I1206 03:08:40.329] [Fail] [k8s.io] [sig-node] Events [It] should be sent by kubelets and the scheduler about pods scheduling and running  [Conformance] 

:/
/retest