Migrate to MTP and latest xunit.v3

[Youssef1313]

Description

{A detailed description}

Fixes #{bug number}

Quality checklist

• [ ] Your code complies with our Coding Style.
• [ ] You've updated unit and/or integration tests for your change, where applicable.
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[bart-vmware]

Hi @Youssef1313, thanks for this PR. I've merged support for .NET 10 into the main branch. Would you like to rebase and give it another try? I suppose we don't need the global.json anymore now?

[bart-vmware]

Superseded by #1626. We don't consider updating to MTPv2 an improvement at this point.