### Is there an existing issue for this?

- [X] I have searched the existing issues and read the documentation

### Question

Using a websocket apigatewayv2 in localstack and i need to change the body of the request e.g. add the connectionid, which is something i can do with a HTTP integration on the AWS gateway, however when I try this with localstack i receive the following error "Unsupported integration type "HTTP" for Websocket API ID" and then prints the ID of the API, if this feature is not enabled then how should we test the actual API where the connectionId and other things are added to the request body

### Anything else?

_No response_
return s and "%s%s" % (s[0].lower(), s[1:])
def first_char_to_upper(s: str) -> str:
    return s and "%s%s" % (s[0].upper(), s[1:])
def format_number(number: float, decimals: int = 2):
    
    
    result = f"{number:.{decimals}f}"
    if "." in result:
        result = result.rstrip("0").rstrip(".")
    return result
def is_number(s: Any) -> bool:
    try:
        float(s)  
        return True
    except (TypeError, ValueError):
        return False
def to_number(s: Any) -> Union[int, float]:
    """Cast the string representation of the given object to a number (int or float), or raise ValueError."""
    try:
        return int(str(s))
    except ValueError:
        return float(str(s))
def is_mac_os() -> bool: