Replace --test test,id by --test test:id in the foundry-prove test argument

[iFrostizz]

The regex that should check if there is an id specified by the user in the --test flag of the foundry-prove command currently cannot make the difference with commas that separate function arguments, so it would be good to replace it with something like a colon : and forget about using regex, but instead

if value.find(':') > 0:
    test, id = value.split(':', 1)
else:
    id = None
    test = value

evm-semantics/kevm-pyk/src/kontrol/__main__.py

Lines 441 to 449 in d5d9efc

	def _parse_test_id_tuple(value: str) -> tuple[str, str | None]:
	pattern = r'^([^,]+)(?:,\s*(\S+))?$'
	match = re.match(pattern, value)
	if match:
	groups = match.groups()
	return groups[0], groups[1] if groups[1] is not None else None
	else:
	raise argparse.ArgumentTypeError("Invalid tuple format. Expected 'test, id' or 'test'")