feat: add hosts config agent support for Windows nodes

[feiskyer]

Reason for Change:

Follow up of #3556: add hosts config agent support for Windows nodes

Issue Fixed:

Requirements:

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

Notes:

[feiskyer]

the first commit is coming from #3556, needs a rebase after it gets merged.

[feiskyer]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[feiskyer]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[jsturtevant]

Look like there was at least one debugging TODO left. Also want to minimize the noise in the logs so we don't fill them up since the call runs regularly.

A rebase will be need for recent changes to the powershell. We moved the powershell scripts due to signing requirements: #3441. There are instructions in the PR that demonstrate where the PS should live, how to test and how to make updates but the functionality itself should stay similar. Let me know if you have questions.

[feiskyer]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[feiskyer]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov]

Codecov Report

Merging #3572 into master will increase coverage by 0.00%.
The diff coverage is 87.50%.

@@           Coverage Diff           @@
##           master    #3572   +/-   ##
=======================================
  Coverage   73.16%   73.17%           
=======================================
  Files         147      147           
  Lines       25097    25110   +13     
=======================================
+ Hits        18362    18373   +11     
- Misses       5604     5605    +1     
- Partials     1131     1132    +1     

Impacted Files	Coverage Δ
pkg/engine/templates_generated.go	53.61% <77.77%> (+0.15%)	⬆️
pkg/api/types.go	94.24% <100.00%> (+0.02%)	⬆️
pkg/engine/armvariables.go	86.25% <100.00%> (+0.02%)	⬆️
pkg/engine/template_generator.go	81.96% <100.00%> (-0.03%)	⬇️

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[feiskyer]

@jsturtevant could you help to have a look again?

[feiskyer]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[feiskyer]

@jsturtevant could you help to have a look again?

[feiskyer]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[jsturtevant]

/lgtm

[acs-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: feiskyer, jsturtevant
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