[Deps] Upgrade .NET Runtime package versions to 10.0.8

[snickler]

Summary of the Pull Request

Updates .NET 10 Runtime / Library packages to the latest 10.0.8 servicing release for security fixes.

PR Checklist

• Closes: #xxx

• Communication: I've discussed this with core contributors already. If the work hasn't been agreed, this work might be rejected
• Tests: Added/updated and all pass
• Localization: All end-user-facing strings can be localized
• Dev docs: Added/updated
• New binaries: Added on the required places
  • JSON for signing for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Updates the runtime-related package versions in Directory.Packages.props from 10.0.7 to 10.0.8.

Validation Steps Performed

[niels9001]

@snickler I've done a nuget restore - is this PR ready for review?

[snickler]

@niels9001 yep! If all the packages are up there, it's ready to rock

[Copilot]

Pull request overview

This PR updates centrally managed NuGet package versions for the .NET 10 servicing line from 10.0.7 to 10.0.8, aligning the repo with the latest .NET 10 patch release for security/servicing fixes.

Changes:

• Bump Microsoft.Extensions.* packages from 10.0.7 → 10.0.8.
• Bump several System.* and Microsoft.* runtime-adjacent packages from 10.0.7 → 10.0.8 in Directory.Packages.props.