[Dexter] Fix failing clang-opt-bisect sub tool test

  Fixes a mismatch in expected arguments passed to run_debugger_subprocess

  Fix for:
    https://reviews.llvm.org/D76926
    rG9cf9710bb0d61cb5c27c6e780af6a182cb162bfb

GitOrigin-RevId: b1097e29d3d06be1d5767dffddaa8f9c5dbdcc83
1 file changed