gh-153438: Update NuGet download URL

[harjothkhara]

Closes #153438.

The aka.ms/nugetclidl redirect no longer resolves to nuget.exe, which
breaks Windows build bootstrapping when no suitable Python is installed.

This change:

• uses the current NuGet CLI download URL in both the regular Windows build
  bootstrap and MSI external-dependency bootstrap;
• updates the matching Windows documentation; and
• adds a Build NEWS entry.

Validation:

• Tools/patchcheck/patchcheck.py against the staged diff
• git diff --cached --check
• replacement endpoint returns HTTP 200 with
  Content-Type: application/x-msdownload

The Windows batch execution itself was not run locally because the development
host is macOS.

• Issue: PCbuild/find_python.bat uses broken aka.ms/nugetclidl URL for downloading nuget.exe #153438

[read-the-docs-community]

Documentation build overview

📚 cpython-previews | 🛠️ Build #33525863 | 📁 Comparing 6c44585 against main (6c389c4)

  🔍 Preview build  

2 files changed

± using/windows.html
± whatsnew/changelog.html

[miss-islington-app]

Thanks @harjothkhara for the PR, and @zooba for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14, 3.15.
🐍🍒⛏🤖 I'm not a witch! I'm not a witch!

[bedevere-app]

GH-153509 is a backport of this pull request to the 3.15 branch.

[miss-islington-app]

Sorry, @harjothkhara and @zooba, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 106eb532ea3b243423e62a702719e9d3c0e40c16 3.13

[bedevere-app]

GH-153510 is a backport of this pull request to the 3.14 branch.

[bedevere-app]

GH-153515 is a backport of this pull request to the 3.13 branch.