The DWARF debug info should work just as well.
Since 8c03f400a837dc9333e54ab371e7904aa2bec43c in llvm-project,
llvm-symbolizer prefers DWARF over PDB if there is a DWARF section
in the inspected executable. Thus, in order to use PDB, one would
have to strip out any remnants of DWARF debug info from the executable,
like in run-lldb-tests.sh (e.g. by -Wl,-s).
For the purposes of this test, simplifying the setup to use DWARF
works just as well.