chore: update Windows VHD to include 8B patches

[mainred]

Reason for Change:

August 11 patches for windows are released

https://support.microsoft.com/en-us/help/4565349

Requirements:

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

Notes:

[jsturtevant]

The base image the VHD is based on, also needs to be updated:

aks-engine/vhd/packer/windows-vhd-builder.json

Line 29 in c273c51

"image_version": "17763.1282.2006061952",

should be updated to 17763.1339.2007101755

az vm image show --urn MicrosoftWindowsServer:WindowsServer:2019-Datacenter-Core-with-Containers-smalldisk:latest
{
  "automaticOsUpgradeProperties": {
    "automaticOsUpgradeSupported": false
  },
  "dataDiskImages": [],
  "hyperVgeneration": "V1",
  "id": "/Subscriptions/b9d9436a-0c07-4fe8-b779-2c1030bd7997/Providers/Microsoft.Compute/Locations/westus/Publishers/MicrosoftWindowsServer/ArtifactTypes/VMImage/Offers/WindowsServer/Skus/2019-Datacenter-Core-with-Containers-smalldisk/Versions/17763.1339.2007101755",
  "location": "westus",
  "name": "17763.1339.2007101755",
  "osDiskImage": {
    "operatingSystem": "Windows",
    "sizeInBytes": 32214352384,
    "sizeInGb": 31
  },
  "plan": null,
  "tags": null
}

[mainred]

@jsturtevant . Thanks for your comment.
To understand the base image change, I think it's because a windows patch contains changes based on the last month's base image, cc @AbelHu

[jsturtevant]

/lgtm

[jsturtevant]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[acs-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: AbelHu, jsturtevant, mainred
To complete the pull request process, please assign mboersma
You can assign the PR to them by writing /assign @mboersma in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

Merging #3692 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3692      +/-   ##
==========================================
- Coverage   73.14%   73.10%   -0.05%     
==========================================
  Files         147      147              
  Lines       25220    25257      +37     
==========================================
+ Hits        18448    18463      +15     
- Misses       5638     5657      +19     
- Partials     1134     1137       +3     

Impacted Files	Coverage Δ
pkg/armhelpers/mockclients.go	21.84% <0.00%> (-0.34%)	⬇️
pkg/armhelpers/kubeclient.go	0.00% <0.00%> (ø)
pkg/armhelpers/azurestack/kubeclient.go	0.00% <0.00%> (ø)
pkg/operations/kubernetesupgrade/upgrader.go	63.55% <0.00%> (+0.31%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c273c51...9dd1c32. Read the comment docs.