Migrate to MTP

[Youssef1313]

Duplicating #37001, but opening from upstream instead of fork as CI doesn't play nicely with PRs from forks (#37617 is improving that)

[crutkas]

@Youssef1313 i updated the spell check file for you

[Youssef1313]

Thanks @crutkas.

For the following failure, is that known flakiness?

2025-02-27T17:49:23.8007336Z    204>D:\a\_work\1\s\x64\Release\tests\Hosts.UITests\net9.0-windows10.0.22621.0\PowerToys.Hosts.UITests.dll : error test failed: TestAddingEntry (1s 178ms): Unable to create instance of class Hosts.UITests.HostModuleTests. Error: OpenQA.Selenium.WebDriverException: A exception with a null response was thrown sending an HTTP request to the remote WebDriver server for URL http://127.0.0.1:4723/session. The status of the exception was UnknownError, and the message was: No connection could be made because the target machine actively refused it. [::ffff:127.0.0.1]:4723 (127.0.0.1:4723) ---> System.Net.WebException: No connection could be made because the target machine actively refused it. [::ffff:127.0.0.1]:4723 (127.0.0.1:4723) ---> System.Net.Http.HttpRequestException: No connection could be made because the target machine actively refused it. [::ffff:127.0.0.1]:4723 (127.0.0.1:4723) ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it. [::ffff:127.0.0.1]:4723. [D:\a\_work\1\s\src\modules\Hosts\Hosts.UITests\Hosts.UITests.csproj]

[crutkas]

Adding in @yeelam-gordon as his team is helping increase the UI testing here.

[crutkas]

actually adding in @jamrobot as looks like he did some recent touching here too in a different PR

[crutkas]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).