[net8.0] Remove support for .NET 6.

[rolfbjarne]

Context: https://dotnet.microsoft.com/platform/support/policy/maui

A major version of .NET MAUI receives support for a minimum of 6
months after a successor (the next major release) ships. For
example, .NET MAUI 6.0 will be supported for 6 months after .NET
MAUI 7.0 ships. Similarly, .NET MAUI 7.0 will receive support for 6
months after .NET MAUI 8.0 ships.

By the time .NET 8 GA ships, .NET 6 MAUI projects will not be supported.

Remove .NET 6 support from our .NET 8 workloads.

[vs-mobiletools-engineering-service2]

❌ [CI Build] Windows Integration Tests failed ❌

❌ Failed ❌

Pipeline on Agent
Hash: 382c1062b8a66cf29e070fe2cd5ff32d95b2a116 [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: 382c1062b8a66cf29e070fe2cd5ff32d95b2a116 [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: 382c1062b8a66cf29e070fe2cd5ff32d95b2a116 [PR build]

[vs-mobiletools-engineering-service2]

📚 [PR Build] Artifacts 📚

Packages generated

View packages

• Microsoft.iOS.Bundle.16.2.8513-ci.pr.gh17901.pkg
• Microsoft.iOS.Ref.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.iOS.Runtime.ios-arm64.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.iOS.Runtime.iossimulator-arm64.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.iOS.Runtime.iossimulator-x64.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.iOS.Sdk.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.iOS.Templates.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.iOS.Windows.Sdk.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.MacCatalyst.Bundle.16.2.8513-ci.pr.gh17901.pkg
• Microsoft.MacCatalyst.Ref.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.MacCatalyst.Runtime.maccatalyst-arm64.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.MacCatalyst.Runtime.maccatalyst-x64.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.MacCatalyst.Sdk.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.MacCatalyst.Templates.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.macOS.Bundle.13.1.8513-ci.pr.gh17901.pkg
• Microsoft.macOS.Ref.13.1.8513-ci.pr.gh17901.nupkg
• Microsoft.macOS.Runtime.osx-arm64.13.1.8513-ci.pr.gh17901.nupkg
• Microsoft.macOS.Runtime.osx-x64.13.1.8513-ci.pr.gh17901.nupkg
• Microsoft.macOS.Sdk.13.1.8513-ci.pr.gh17901.nupkg
• Microsoft.macOS.Templates.13.1.8513-ci.pr.gh17901.nupkg
• Microsoft.NET.Sdk.iOS.Manifest-8.0.100-preview.2.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.NET.Sdk.MacCatalyst.Manifest-8.0.100-preview.2.16.2.8513-ci.pr.gh17901.nupkg
• Microsoft.NET.Sdk.macOS.Manifest-8.0.100-preview.2.13.1.8513-ci.pr.gh17901.nupkg
• Microsoft.NET.Sdk.tvOS.Manifest-8.0.100-preview.2.16.1.9301-ci.pr.gh17901.nupkg
• Microsoft.NET.Workload.iOS.16.2.8513-ci.pr.gh17901.msi
• Microsoft.tvOS.Bundle.16.1.9301-ci.pr.gh17901.pkg
• Microsoft.tvOS.Ref.16.1.9301-ci.pr.gh17901.nupkg
• Microsoft.tvOS.Runtime.tvos-arm64.16.1.9301-ci.pr.gh17901.nupkg
• Microsoft.tvOS.Runtime.tvossimulator-arm64.16.1.9301-ci.pr.gh17901.nupkg
• Microsoft.tvOS.Runtime.tvossimulator-x64.16.1.9301-ci.pr.gh17901.nupkg
• Microsoft.tvOS.Sdk.16.1.9301-ci.pr.gh17901.nupkg
• Microsoft.tvOS.Templates.16.1.9301-ci.pr.gh17901.nupkg
• xamarin.ios-16.2.1.513.pkg
• xamarin.mac-9.1.1.513.pkg

Pipeline on Agent XAMBOT-1177.Ventura
Hash: 382c1062b8a66cf29e070fe2cd5ff32d95b2a116 [PR build]

[vs-mobiletools-engineering-service2]

🔥 Failed to compare API and create generator diff 🔥

Failed to update apidiff references

Pipeline on Agent
Hash: 382c1062b8a66cf29e070fe2cd5ff32d95b2a116 [PR build]

[rolfbjarne]

/sudo backport release/8.0.1xx-preview3

[vs-mobiletools-engineering-service2]

Backport Job to branch release/8.0.1xx-preview3 Created! The magic is happening here

[vs-mobiletools-engineering-service2]

Hooray! Backport succeeded! Please see https://devdiv.visualstudio.com/DevDiv/_build/results?buildId=7541975 for more details.

[vs-mobiletools-engineering-service2]

🚀 [CI Build] Test results 🚀

Test results

✅ All tests passed on VSTS: simulator tests.

🎉 All 219 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. [attempt 2] 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 6 tests passed. Html Report (VSDrops) Download
✅ monotouch: All 25 tests passed. [attempt 2] 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: 382c1062b8a66cf29e070fe2cd5ff32d95b2a116 [PR build]