feat: add support for Kubernetes 1.16.11

[mboersma]

Reason for Change:
See https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.16.md#changelog-since-v11610

Issue Fixed:

Requirements:

• Kubernetes artifacts built and pushed by Azure Pipelines
• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[jackfrancis]

/lgtm

[codecov]

Codecov Report

Merging #3496 into master will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3496      +/-   ##
==========================================
+ Coverage   73.15%   73.21%   +0.06%     
==========================================
  Files         147      147              
  Lines       25049    25810     +761     
==========================================
+ Hits        18324    18898     +574     
- Misses       5591     5775     +184     
- Partials     1134     1137       +3     

Impacted Files	Coverage Δ
pkg/api/common/versions.go	96.84% <ø> (ø)
pkg/api/addons.go	97.46% <0.00%> (-0.31%)	⬇️
pkg/engine/templates_generated.go	59.50% <0.00%> (+5.42%)	⬆️

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[mboersma]

/hold

This has a temporary testing commit that should be discarded once it passes.

[mboersma]

This passed CI, so I'll strip off the temp commit and it should be ready for review.

[mboersma]

/hold cancel

[jackfrancis]

/lgtm

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jackfrancis, mboersma

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