Enable nodejs in js processor

[lovromazgon]

Description

This adds support for goja_nodejs in the JavaScript processor. This enables us to use utilities like the buffer to manipulate raw data. For example, I used it in a pipeline to encode raw data as base64:

const Buffer = require("node:buffer").Buffer;

function process(record) {
    record.Payload.After.Raw = Buffer.from(record.Payload.After.Raw).toString("base64");
    return record;
}

Quick checks:

• I have followed the Code Guidelines.
• There is no other pull request for the same update/change.
• I have written unit tests. (if I get the time I'll add some later, did manually test though)
• I have made sure that the PR is of reasonable size and can be easily reviewed.

[simonl2002]

lgtm