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/coreinfo_scraper.py

@@ -308,6 +308,7 @@ def main() -> None:
     import argparse
 
     parser = argparse.ArgumentParser(
+        allow_abbrev=False,
         description="Scrape libretro-core-info firmware requirements"
     )
     parser.add_argument("--dry-run", action="store_true")