Focus on VS 2022 in article "Win32 sample app"

[mikehoffms]

todo: copy from commit history of #3233 the improvements that were made to this article, before this article was removed from that PR. the commit eg find the word "branch", about git operations within VS.

Rendered article for review:

• Win32 sample app
  • https://review.learn.microsoft.com/microsoft-edge/webview2/samples/webview2apissample?branch=pr-en-us-3242
  • Before/Live

This PR updates the article about the main sample (WebView2APISample), to focus on VS 2022 rather than VS 2019.

VS 2022 is fully supported for WebView2. Docs for machine setup and GetStarts and Samples are still centered on VS 2019. This PR doesn't update all articles to shift emphasis to VS 2022, but instead, focuses only on updating the article about the main sample.

This PR will handle 3 comments from a previously opened PR:

• Comment link on Files Changed page. Comment link on PR main page. "171 - Do users need to retarget using 2019 build tools?"

• Comment link on Files Changed page. Comment link on PR main page. "99 - the general steps can be summarized as follows"

• Comment link on Files Changed page. Comment link on PR main page. "75 - verbose, just state "Open VS 2022""

AB#52989036

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