Force LLDB tests to run in series

Parallel execution is broken, anyway

tests/tests.py

@@ -48,12 +48,20 @@ def main():
         )
         sys.exit(1)
 
+    force_serial = False
     match args.driver:
         case Driver.GDB:
             host = get_gdb_host(args, local_pwndbg_root)
         case Driver.LLDB:
             host = get_lldb_host(args, local_pwndbg_root)
 
+            # LLDB does not properly support having its tests run in parallel,
+            # so we forcibly disable it, for now.
+            print(
+                "WARNING: LLDB tests always run in series, even when parallel execution is requested."
+            )
+            force_serial = True
+
     # Handle the case in which the user only wants the collection to run.
     if args.collect_only:
         for test in host.collect():
@@ -62,7 +70,12 @@ def main():
 
     # Actually run the tests.
     run_tests_and_print_stats(
-        host, args.test_name_filter, args.pdb, args.serial, args.verbose, coverage_out
+        host,
+        args.test_name_filter,
+        args.pdb,
+        force_serial or args.serial,
+        args.verbose,
+        coverage_out,
     )