The windows-2016 environment used by pipeline (at least smoke test) is going to be deprecated and removed

[BethanyZhou]

Description

##[warning]The windows-2016 environment will be deprecated on November 15, 2021, and removed on March 15, 2022. Migrate to windows-latest instead. For more details see actions/runner-images#4312

https://dev.azure.com/azure-sdk/public/_build/results?buildId=1167885&view=logs&j=2f7369d1-fb97-5262-a571-f4e9c996b7d1

Cost

[isra-fel]

For pipelines running on the public agent pool "Azure pipelines", we are going to replace all vs2017-win2016 to windows-2019.
For pipelines running on "Hosted VS2017" agent pool, which I believe is owned by Azure SDK team, I have contacted them for a plan of updating.
11/3: they are not likely to maintain the Hosted VS2017 agent pool after deprecation of windows-2016. We have to migrate to "Azure Pipelines" (but maybe some tasks cannot run on them) or others.

Link: available images: https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops&tabs=yaml

[isra-fel]

Pipeline
autorest.powershell - daily-build	Azure/autorest.powershell#863
autorest.powershell - security-scan	already win2019
azure-powershell - daily-build	already win2019
azure-powershell - daily-smoke-test	#16299
azure-powershell - docker	ubuntu
azure-powershell - predictor-sign	already win2019
azure-powershell - security-tools	changed to win2019
azure-powershell - sign-tools	already win2019
azure-powershell - sign	changed to win2019
azure-powershell - smoke-test	#16299
azure-powershell-common - daily-build	already win2019
azure-powershell-common sign & publish	Azure/azure-powershell-common#301
azure-powershell-common	changed to win2019
azure-powershell-migration - security-scan	already win2019
azure-powershell-migration - sign	already win2019
azure-powershell-pr - powershell-core	to be synced from public repo
azure-powershell-pr - security-tools	changed to win2019
azure-powershell-pr - windows-powershell	to be synced from public repo
azure-powershell-pr sync	changed to win2019
(Below are public pipelines)
azure-powershell - Code Gen	changed to win2019
azure-powershell - powershell-core	#16299
azure-powershell - windows-powershell	#16299
azure-powershell-migration - security-scan	already win2019
azure-powershell-migration - vscode-extension	ubuntu
Azure.azure-powershell-migration	already win2019

(AzureRM are ignored)