Generated xml from `toXml()` missing namespaces

[prakanth97]

Description:

import ballerina/data.xmldata;
import ballerina/io;

type Wsa_ReplyTo record {
    @xmldata:Namespace {prefix: "wsa", uri: "example1.com"}
    string Address;
};

type Htng_ReplyTo record {
    @xmldata:Namespace {prefix: "htng", uri: "example2.com"}
    string Address;
};

@xmldata:Name {value: "soap"}
type Soap record {
    @xmldata:Name {value: "ReplyTo"}
    @xmldata:Namespace {prefix: "wsa", uri: "example1.com"}
    Wsa_ReplyTo wsaReplyTo;
    @xmldata:Name {value: "ReplyTo"}
    @xmldata:Namespace {prefix: "htng", uri: "example2.com"}
    Htng_ReplyTo htngReplyTo;
};

public function main() returns error? {
    Soap val = {
        htngReplyTo: {
            Address: "address1"
        }, 
        wsaReplyTo: {
            Address: "address2"
        }
    };

    xml xmlVal = check xmldata:toXml(val);
    io:println(xmlVal);
}

generated output:

<soap><ReplyTo><htng:Address xmlns:htng="example2.com">address1</htng:Address></ReplyTo></soap>

Steps to reproduce:

Affected Versions:

OS, DB, other environment details and versions:

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