### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When calling 

`cloudWatchClient.EnableAlarmActions(&cloudwatch.EnableAlarmActionsInput{AlarmNames: alarmNames})`

with golang I receive a SerializationError with bytes in the error message saying: 

`<!DOCTYPE HTM |UBLIC "-//W3C//DTD HTML 3.2 Final//EN">.<title>500 Internal Server Error</title>.<h1>Internal Server Error</h1>.<p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.`

I believe this is a bug, since other cloudwatch operations like "DescribeAlarms" work flawlessly with the same client.

### Expected Behavior

I expected the call to go through without any errors

### How are you starting LocalStack?

With a `docker run` command

### Steps To Reproduce

Start localstack, create alarms and call cloudwatch "EnableAlarmActions"

### Environment

_No response_

### Anything else?

_No response_
client: "CloudWatchClient",
    alarm_name: str,
    current_state: str,
    desired_state: str,
    reason: str = DEFAULT_REASON,
) -> None:
    """Updates the alarm state, if the current_state is different than the desired_state
    :param client: the cloudwatch client
    :param alarm_name: the name of the alarm
    :param current_state: the state the alarm is currently in
    :param desired_state: the state the alarm should have after updating
    :param reason: reason why the state is set, will be used to for set_alarm_state
    """
    if current_state == desired_state:
        return
    client.set_alarm_state(AlarmName=alarm_name, StateValue=desired_state, StateReason=reason)
def calculate_alarm_state(alarm_arn: str) -> None:
    """
    Calculates and updates the state of the alarm
    :param alarm_arn: the arn of the alarm to be evaluated
    """
    alarm_details = get_metric_alarm_details_for_alarm_arn(alarm_arn)