### 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_
"initial_state,expected_state,expected_calls,treat_missing,metric_data",
        [
            
            ("OK", "ALARM", 1, "missing", TEST_1_M_OF_N),
            ("OK", "ALARM", 1, "ignore", TEST_1_M_OF_N),
            ("OK", "ALARM", 1, "breaching", TEST_1_M_OF_N),
            ("OK", "ALARM", 1, "notBreaching", TEST_1_M_OF_N),
            
            ("OK", "ALARM", 1, "missing", TEST_2_M_OF_N),
            ("OK", "ALARM", 1, "ignore", TEST_2_M_OF_N),
            ("OK", "ALARM", 1, "breaching", TEST_2_M_OF_N),
            ("OK", "ALARM", 1, "notBreaching", TEST_2_M_OF_N),
            
            ("INSUFFICIENT_DATA", "OK", 1, "missing", TEST_3_M_OF_N),
            ("INSUFFICIENT_DATA", "OK", 1, "ignore", TEST_3_M_OF_N),
            ("INSUFFICIENT_DATA", "ALARM", 1, "breaching", TEST_3_M_OF_N),
            ("INSUFFICIENT_DATA", "OK", 1, "notBreaching", TEST_3_M_OF_N),
            
            ("INSUFFICIENT_DATA", "OK", 1, "missing", TEST_4_M_OF_N),
            ("INSUFFICIENT_DATA", "OK", 1, "ignore", TEST_4_M_OF_N),
            ("INSUFFICIENT_DATA", "ALARM", 1, "breaching", TEST_4_M_OF_N),
            ("INSUFFICIENT_DATA", "OK", 1, "notBreaching", TEST_4_M_OF_N),
            
            ("INSUFFICIENT_DATA", "ALARM", 1, "missing", TEST_5_M_OF_N),
            ("INSUFFICIENT_DATA", "INSUFFICIENT_DATA", 0, "ignore", TEST_5_M_OF_N),
            ("INSUFFICIENT_DATA", "ALARM", 1, "breaching", TEST_5_M_OF_N),
            ("INSUFFICIENT_DATA", "OK", 1, "notBreaching", TEST_5_M_OF_N),
        ],
    )
    def test_calculate_alarm_state_2_out_of_3(