[msbuild] Don't try to run 'dotnet build' if 'dotnet restore' failed in the XamarinBuild task.

[rolfbjarne]

This avoids throwing spurious exceptions when we blinding keep executing stuff
that doesn't make sense anymore.

[vs-mobiletools-engineering-service2]

💻 [CI Build] Windows Integration Tests passed 💻

✅ All Windows Integration Tests passed.

Pipeline on Agent
Hash: 2c0f6b0287a5be9e39f9a96aeeed31d2c619346b [PR build]

[vs-mobiletools-engineering-service2]

📚 [PR Build] Artifacts 📚

Packages generated

View packages

• xamarin.ios-16.5.0.329.pkg
• xamarin.mac-9.4.0.329.pkg

Pipeline on Agent
Hash: [PR build]

[vs-mobiletools-engineering-service2]

💻 [PR Build] Tests on macOS M1 - Mac Ventura (13.0) passed 💻

✅ All tests on macOS M1 - Mac Ventura (13.0) passed.

Pipeline on Agent
Hash: [PR build]

[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 (Breaking changes)

Legacy Xamarin (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)

• iOS: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)
• tvOS: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)
• watchOS: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)
• macOS: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)

.NET (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)

• iOS: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)
• tvOS: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)
• MacCatalyst: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)
• macOS: vsdrops gist (:heavy_exclamation_mark: Breaking changes :heavy_exclamation_mark:)
• 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: 2c0f6b0287a5be9e39f9a96aeeed31d2c619346b [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: [PR build]

[vs-mobiletools-engineering-service2]

🚀 [CI Build] Test results 🚀

Test results

✅ All tests passed on VSTS: simulator tests.

🎉 All 235 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 35 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: e5064d0f129094a203574c3a0ef565831e400d36 [PR build]