[X] bug report
[ ] feature request

# Detailed description

The AWS API supports Authorization parameters as GET parameters, e.g. here's a GET request to SendMessage on SQS:

```
curl 'http://localhost:4566/000000000000/SomeQueue.fifo?Action=SendMessage&MessageGroupId=Default&MessageDeduplicationId=1615597859837&MessageBody=%7B%22gateway_id%22%3A%20%2204e73c80-3539-499c-92a4-a0b106c2f6ab%22%7D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=test%2F20210313%2Fus-east-1%2Fsqs%2Faws4_request&X-Amz-Date=20210313T011059Z&X-Amz-Expires=86400000&X-Amz-SignedHeaders=host&X-Amz-Signature=2c652c7bc9a3b75579db3d987d1e6dd056f0ac776c1e1d4ec91e2ce84e5ad3ae'
```

## Expected behavior

Should send the message and return receipt information.

## Actual behavior

Returns...

```
<?xml version="1.0" encoding="UTF-8"?>
<Error>
    <Code>NoSuchBucket</Code>
    <Message>The specified bucket does not exist</Message>
    <BucketName>000000000000</BucketName>
    <RequestID>7a62c49f-347e-4fc4-9331-6e8eEXAMPLE</RequestID>
</Error>
```

path = path or '/'
        result = 'cloudfront', config.PORT_CLOUDFRONT
    elif target.startswith('AWSCognitoIdentityProviderService') or 'cognito-idp.' in host:
        result = 'cognito-idp', config.PORT_COGNITO_IDP
    elif target.startswith('AWSCognitoIdentityService') or 'cognito-identity.' in host:
        result = 'cognito-identity', config.PORT_COGNITO_IDENTITY
    elif result[0] == 's3' or re.match(r'.*s3(\-website)?\.([^\.]+\.)?amazonaws.com', host):
        host = re.sub(r's3-website\..*\.amazonaws', 's3.amazonaws', host)
        result = 's3', config.PORT_S3
    elif result[0] == 'states' in auth_header or host.startswith('states.'):
        result = 'stepfunctions', config.PORT_STEPFUNCTIONS
    elif 'route53.' in host:
        result = 'route53', config.PORT_ROUTE53
    elif result[0] == 'monitoring':
        result = 'cloudwatch', config.PORT_CLOUDWATCH
    elif result[0] == 'execute-api' or '.execute-api.' in host:
        result = 'apigateway', config.PORT_APIGATEWAY
    elif target.startswith('Firehose_'):
        result = 'firehose', config.PORT_FIREHOSE
    elif target.startswith('DynamoDB_'):
        result = 'dynamodb', config.PORT_DYNAMODB
    elif target.startswith('DynamoDBStreams') or host.startswith('streams.dynamodb.'):
        
        result = result_before = 'dynamodbstreams', config.PORT_DYNAMODBSTREAMS
    elif ls_target == 'web':
        result = 'web', config.PORT_WEB_UI
    elif result[0] == 'EventBridge' or target.startswith('AWSEvents'):
        result = 'events', config.PORT_EVENTS
    return result[0], result_before[1] or result[1], path, host
def is_s3_form_data(data_bytes):