PutBucketACL: "unsupported grantee type" results in 500 status code

[evgeniiz321]

test_bucket_acl_grant_email_not_exist

    grant = {
        "Grantee": {"EmailAddress": NONEXISTENT_EMAIL, "Type": "AmazonCustomerByEmail"},
        "Permission": "FULL_CONTROL",
    }

s3 gw returns 500:

2023-11-11T17:37:38.509Z	error	handler/util.go:29	call method	{"status": 500, "request_id": "c89a5b25-3e28-42dd-a0cc-bbaf2aa17fd6", "method": "PutBucketACL", "bucket": "yournamehere-9rfrvca8saylokmt-1", "object": "", "description": "could not translate acl to policy", "error": "unsupported grantee type"}

Should return either 40x or NotImplemented in this case

[smallhive]

Returning not supported error, HTTP 501, not implemented. See #926