gh-142913: fix _testinternalcapi build failure due to undefined JIT symbols

[cocolato]

Root cause:

The fix in 949b5ec removed the Tier 2 interpreter loop from Modules/_testinternalcapi/interpreter.c, but test_cases.c.h is generated from Python/bytecodes.c and still contains the TRACE_RECORD and TRACE_END instructions which call:

• _PyJit_translate_single_bytecode_to_trace()
• _PyJit_TryInitializeTracing()
• _PyJit_FinalizeTracing()

These functions are defined in Python/optimizer.c but are not exported (missing PyAPI_FUNC), causing link failures when building the shared library.

• Issue: Add test coverage for interpreter loop generator overridden insts #142913