[dotnet] Add class library project templates for tvOS, macOS and Mac Catalyst.

[rolfbjarne]

These new project templates won't show up in VSMac until the new templates are
added to VSMac.

Ref: https://github.com/xamarin/vsmac-xamarin-extensions/blob/61afbd1cd188150e82861c21cee0eb355b39c574/Xamarin.Addins.Core/Xamarin.Ide.Templating/TemplateDescriptionProvider.cs#L207-L216

Also update the corresponding template tests.

This PR might be easier to review commit-by-commit due to the large number of generated localization files.

[vs-mobiletools-engineering-service2]

✅ API diff for current PR / commit

Legacy Xamarin (No breaking changes)

• iOS (no change detected)
• tvOS (no change detected)
• watchOS (no change detected)
• macOS (no change detected)

NET (empty diffs)

• iOS: (empty diff detected)
• tvOS: (empty diff detected)
• MacCatalyst: (empty diff detected)
• macOS: (empty diff detected)

✅ API diff vs stable

Legacy Xamarin (No breaking changes)

• iOS: vsdrops gist (No breaking changes)
• tvOS: vsdrops gist (No breaking changes)
• watchOS: vsdrops gist (No breaking changes)
• macOS: vsdrops gist (No breaking changes)

.NET (No breaking changes)

• iOS: vsdrops gist (No breaking changes)
• tvOS: vsdrops gist (No breaking changes)
• MacCatalyst: vsdrops gist (No breaking changes)
• macOS: vsdrops gist (No breaking changes)
• Microsoft.iOS vs Microsoft.MacCatalyst: vsdrops gist

Legacy Xamarin (stable) vs .NET

• iOS: vsdrops gist
• tvOS: vsdrops gist
• macOS: vsdrops gist

✅ Generator diff

Generator diff is empty

Pipeline on Agent
Hash: 3a57beaa31663b44d102f76e3d1f21e07f3bbdb4 [PR build]

[vs-mobiletools-engineering-service2]

📚 [PR Build] Artifacts 📚

Packages generated

View packages

• Microsoft.iOS.Bundle.15.4.517-ci.pr.gh16263.pkg
• Microsoft.iOS.Ref.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Runtime.ios-arm.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Runtime.ios-arm64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Runtime.iossimulator-arm64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Runtime.iossimulator-x64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Runtime.iossimulator-x86.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Sdk.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Templates.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.iOS.Windows.Sdk.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.MacCatalyst.Bundle.15.4.517-ci.pr.gh16263.pkg
• Microsoft.MacCatalyst.Ref.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.MacCatalyst.Runtime.maccatalyst-arm64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.MacCatalyst.Runtime.maccatalyst-x64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.MacCatalyst.Sdk.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.MacCatalyst.Templates.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.macOS.Bundle.12.3.517-ci.pr.gh16263.pkg
• Microsoft.macOS.Ref.12.3.517-ci.pr.gh16263.nupkg
• Microsoft.macOS.Runtime.osx-arm64.12.3.517-ci.pr.gh16263.nupkg
• Microsoft.macOS.Runtime.osx-x64.12.3.517-ci.pr.gh16263.nupkg
• Microsoft.macOS.Sdk.12.3.517-ci.pr.gh16263.nupkg
• Microsoft.macOS.Templates.12.3.517-ci.pr.gh16263.nupkg
• Microsoft.NET.Sdk.iOS.Manifest-6.0.400.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.NET.Sdk.MacCatalyst.Manifest-6.0.400.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.NET.Sdk.macOS.Manifest-6.0.400.12.3.517-ci.pr.gh16263.nupkg
• Microsoft.NET.Sdk.tvOS.Manifest-6.0.400.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.NET.Workload.iOS.15.4.517-ci.pr.gh16263.msi
• Microsoft.tvOS.Bundle.15.4.517-ci.pr.gh16263.pkg
• Microsoft.tvOS.Ref.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.tvOS.Runtime.tvos-arm64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.tvOS.Runtime.tvossimulator-arm64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.tvOS.Runtime.tvossimulator-x64.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.tvOS.Sdk.15.4.517-ci.pr.gh16263.nupkg
• Microsoft.tvOS.Templates.15.4.517-ci.pr.gh16263.nupkg
• xamarin.ios-15.13.0.213.pkg
• xamarin.mac-8.13.0.213.pkg

Pipeline on Agent XAMBOT-1098.Monterey'
Hash: 3a57beaa31663b44d102f76e3d1f21e07f3bbdb4 [PR build]

[vs-mobiletools-engineering-service2]

💻 [PR Build] Tests on macOS M1 - Mac Big Sur (11.5) passed 💻

✅ All tests on macOS M1 - Mac Big Sur (11.5) passed.

Pipeline on Agent
Hash: 3a57beaa31663b44d102f76e3d1f21e07f3bbdb4 [PR build]

[vs-mobiletools-engineering-service2]

🚀 [CI Build] Test results 🚀

Test results

✅ All tests passed on VSTS: simulator tests.

🎉 All 223 tests passed 🎉

Tests counts

✅ bcl: All 69 tests passed. Html Report (VSDrops) Download
✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests: All 1 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 7 tests passed. Html Report (VSDrops) Download
✅ framework: All 8 tests passed. Html Report (VSDrops) Download
✅ generator: All 2 tests passed. Html Report (VSDrops) Download
✅ interdependent_binding_projects: All 7 tests passed. Html Report (VSDrops) Download
✅ install_source: All 1 tests passed. Html Report (VSDrops) Download
✅ introspection: All 8 tests passed. Html Report (VSDrops) Download
✅ linker: All 65 tests passed. Html Report (VSDrops) Download
✅ mac_binding_project: All 1 tests passed. Html Report (VSDrops) Download
✅ mmp: All 2 tests passed. Html Report (VSDrops) Download
✅ mononative: All 12 tests passed. Html Report (VSDrops) Download
✅ monotouch: All 23 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ mtouch: All 1 tests passed. Html Report (VSDrops) Download
✅ xammac: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 8 tests passed. Html Report (VSDrops) Download
✅ xtro: All 2 tests passed. Html Report (VSDrops) Download

Pipeline on Agent
Hash: [PR build]