When generating API stubs with the scaffold utility using, e.g., `python -m localstack.aws.scaffold sns`,
the scaffold creates method names from operation names, which are ugly when acronyms (subsequent uppercase characters that belong together).

Example:
`CreateSMSSandboxPhoneNumber` -> `create_s_m_s_sandbox_phone_number`

it would be nicer to have `create_sms_sandbox_phone_number`

This is a limitation of this method: https://github.com/localstack/localstack/blob/1888e66b85d7e6a8ee457bc7a732984fcf7aa830/localstack/utils/common.py#L978-L979
for tmp in TMP_FILES:
        try:
            rm_rf(tmp)
        except Exception:
            pass  
    del TMP_FILES[:]
def new_tmp_file() -> str:
    """Return a path to a new temporary file."""
    tmp_file, tmp_path = tempfile.mkstemp()
    os.close(tmp_file)
    TMP_FILES.append(tmp_path)
    return tmp_path
def new_tmp_dir():
    folder = new_tmp_file()
    rm_rf(folder)
    mkdir(folder)
    return folder
def is_ip_address(addr):
    try:
        socket.inet_aton(addr)
        return True
    except socket.error:
        return False
def is_ipv4_address(address: str) -> bool: