feat: ensure all AKS required ports on api-server are exposed

[gtracer]

Reason for Change:

AKS requires two ports to be exposed beyond 443. These ports are used for tunnelfront to connect to tunnelend and when customers block them (firewall etc.) it causes clusters to fail

Issue Fixed:

Requirements:

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

Notes:
Looks to me like the apiserver connection check is sectioned to aks only since it is for hosted master but if that is wrong and aks-engine clusters could also trigger this code then please let me know as these ports are only needed for aks clusters

[jackfrancis]

Hi @gtracer, if you run make generate and then commit the resultant generated code we can kick off E2E

[jveski]

lgtm for the tunnel ports 👍

[jackfrancis]

/lgtm

[jackfrancis]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[codecov]

Codecov Report

Merging #3488 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3488   +/-   ##
=======================================
  Coverage   73.17%   73.17%           
=======================================
  Files         147      147           
  Lines       25040    25040           
=======================================
  Hits        18323    18323           
  Misses       5583     5583           
  Partials     1134     1134           

Impacted Files	Coverage Δ
pkg/engine/templates_generated.go	54.08% <ø> (ø)

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