.NET SDK images updated with new PowerShell versions

[lbussell]

.NET SDK images have been updated to include PowerShell v7.4.0 (.NET 8), v7.3.10 (.NET 7), and v7.2.17 (.NET 6).

These PowerShell versions were updated out-of-band with our normal .NET release cadence, so all of the affected fixed-version SDK tags have been given a -1 suffix (e.g. mcr.microsoft.com/dotnet/sdk:8.0.100-1). Floating tags, like mcr.microsoft.com/dotnet/sdk:8.0 reference the latest images with the new PowerShell version.

If you don't want the update or need to roll back for any reason, you can reference the old tags without the suffix (e.g. mcr.microsoft.com/dotnet/sdk:8.0.100).