fix: refuse abbreviated flags in every script

argparse completed a prefix into the only flag starting with it:
slots.py --emulator read profiles from a directory named after the
emulator and reported nothing, and pipeline.py --all built every pack
variant. Every parser now refuses an abbreviation.

scripts/check_buildbot_system.py

@@ -177,6 +177,7 @@ def update_changed(report: dict) -> list[str]:
 def main() -> None:
     logging.basicConfig(level=logging.INFO, format="%(message)s")
     parser = argparse.ArgumentParser(
+        allow_abbrev=False,
         description="Check buildbot system directory for changes",
     )
     parser.add_argument(