🍒 [6.0][cxx-interop] Do not export enums with indirect associated values #76213
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Explanation: Indirect enum cases can trigger infinite recursion. This PR stops attempting to export them to C++.
Scope: C++ reverse interop.
Risk: Low, we skip the problematic pattern.
Testing: Regression test added.
Issue: rdar://134852756
Reviewer: @egorzhdan
Original PR: #76167