Onboard repo to the .NET 10 sdk

[eiriktsarpalis]

For now this only bumps the .NET SDK and test projects without adding the net10.0 target in product code.

[eiriktsarpalis]

Cross referencing dotnet/sdk#51060

[eiriktsarpalis]

Seeing crashes related to the blame collector in non-Windows environments:

Data collector 'Blame' message: Could not start process dump: System.PlatformNotSupportedException: Unsupported operating system: macOS 15.6.1, and framework: .NETFramework,Version=v4.7.2.
   at Microsoft.TestPlatform.Extensions.BlameDataCollector.CrashDumperFactory.Create(String targetFramework) in /_/src/vstest/src/Microsoft.TestPlatform.Extensions.BlameDataCollector/CrashDumperFactory.cs:line 61
   at Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcessDumpUtility.StartTriggerBasedProcessDump(Int32 processId, String testResultsDirectory, Boolean isFullDump, String targetFramework, Boolean collectAlways, Action`1 logWarning) in /_/src/vstest/src/Microsoft.TestPlatform.Extensions.BlameDataCollector/ProcessDumpUtility.cs:line 104
   at Microsoft.TestPlatform.Extensions.BlameDataCollector.BlameCollector.TestHostLaunchedHandler(Object sender, TestHostLaunchedEventArgs args) in /_/src/vstest/src/Microsoft.TestPlatform.Extensions.BlameDataCollector/BlameCollector.cs:line 647.

[eiriktsarpalis]

Seems to only occur when there are failing tests. I'm merging this regardless, so that we can better dogfood the new SDK.