[Orc][examples] Temporarily disable tests for the C API due to failures on sanitizer bots

These tests were added while the OrcV2Example tests had been disabled:
https://reviews.llvm.org/rGe5d8cfb2f134fcf0235ec1a35eec875a9cd36b21

Failures on sanitizer bots:
https://green.lab.llvm.org/green/job/clang-stage2-cmake-RgSan/7992/testReport/