feat: add support for Kubernetes v1.16.14 on Azure Stack

[jadarsie]

Reason for Change:

Pre-pull Azure Stack's custom images for K8s 1.16.14

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[codecov]

Codecov Report

Merging #3704 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3704   +/-   ##
=======================================
  Coverage   73.16%   73.16%           
=======================================
  Files         147      147           
  Lines       25318    25318           
=======================================
  Hits        18525    18525           
  Misses       5655     5655           
  Partials     1138     1138           

Impacted Files	Coverage Δ
pkg/api/common/versions.go	96.84% <ø> (ø)

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[mboersma]

@jadarsie I think you need to rebase off current master to get #3707 and work around the Windows VHD issue. Sorry about that!

Edit: Never mind, I did the rebase.

[mboersma]

This is failing with QuotaExceeded now, but that pipeline passed before I had to rebase this, so I'm going to merge it.

[mboersma]

/lgtm

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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