Universal Test Configuration Gaps

[jonthysell]

We have several gaps in our native testing for Universal.

This issue is an attempt to capture what test suits are running where:

✅ - test suite is running 🟨 - test suite cannot run this configuration (by design) 🟥 - test suite is not running, see linked issue

Test Suite	PR: x86 Debug	PR: x64 Release	CI: ARM64 Debug	CI: ARM64 Release	CI: x86 Debug	CI: x86 Release	CI: x64 Debug	CI: x64 Release
M.RN.Cxx.UnitTests	✅	🟥 #8003	🟨	🟨	✅	✅	🟥 #8003	🟥 #8003
M.RN.IntegrationTests	✅	🟥 #8003	🟨	🟨	✅	✅	🟥 #8003	🟥 #8003
Mso.UnitTests	✅	🟥 #8003	🟨	🟨	✅	✅	🟥 #8003	🟥 #8003
M.RN.ComponentTests	🟥 #8673	🟥 #8673	🟨	🟨	🟥 #8673	🟥 #8673	✅	🟥 #8673
M.RN.Managed.UnitTests	✅	✅	🟨	🟨	✅	✅	✅	✅	✅	✅
M.RN.Managed.CodeGen.UnitTests	🟥	✅	🟨	🟨	🟥	🟥	✅	✅

This table should be updated as the gaps are filled.

• [x] #8003
• [ ] #8673

[chiaramooney]

Meta issue. Moving to 71.