Invalid error message for `readonly` types with `parseString` API in `jsondata` module

[SasinduDilshara]

import ballerina/data.jsondata;
import ballerina/io;

type User readonly & record {|
    int id;
|};

public isolated function main() returns error? {
    string user2 = string `{"id": 4012}`;
    User r2 = check jsondata:parseString(user2);
    io:println(r2.id);
}

This gives error: unsupported type '(readonly & record {| int id; |})'. This should be a valid usecase.

[SasinduDilshara]

Duplicate issue : #7253

It is different one. This issue is focused on the parseString API

[github-actions[bot]]

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      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
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