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/verify.py

@@ -2080,7 +2080,7 @@ def main() -> None:
 
 
 def _main(held: contextlib.ExitStack) -> None:
-    parser = argparse.ArgumentParser(description="Platform-native BIOS verification")
+    parser = argparse.ArgumentParser(allow_abbrev=False, description="Platform-native BIOS verification")
     parser.add_argument("--platform", "-p", help="Platform name")
     parser.add_argument(
         "--all", action="store_true", help="Verify all active platforms"