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/scraper/targets/retroarch_targets_scraper.py

@@ -168,6 +168,7 @@ class Scraper(BaseTargetScraper):
 
 def main() -> None:
     parser = argparse.ArgumentParser(
+        allow_abbrev=False,
         description="Scrape RetroArch buildbot nightly targets"
     )
     parser.add_argument("--dry-run", action="store_true", help="Show target summary")