How to reproduce:
1. Open the attached Project "MC2BuildTest2021"
2. Ensure IL2CPP is set as the Scripting Backend in Project Settings
3. Build the Project

Expected result: the Build suceeds
Actual result: The Build fails with the following error:
"System.AggregateException: One or more errors occurred. (Exception while merging Unity.IL2CPP.Contexts.Components.MetadataUsageCollectorComponent)
---> System.InvalidOperationException: Exception while merging Unity.IL2CPP.Contexts.Components.MetadataUsageCollectorComponent
---> System.ArgumentException: An item with the same key has already been added. Key: Vector3_get_forward_mAA55A7034304DF8B2152EAD49AE779FC4CA2EB4AMagicaCloth2_MetadataUsageId"

Reproducible with: 2020.3.45f1, 2021.3.19f1, 2022.2.8f1, 2023.1.0b6, 2023.2.0a4

Notes:
- Issue does not reproduce with Mono set as the Scripting Backend
- Changing the Assembly's "MagicaCloth2" name to "MagicaCloth_2" makes the issue no longer reproducible
- Removing any of the Assemblies makes the issue no longer reproducible