fix(util-body-length-node): fs.ReadStream with path of Buffer type

[trivikr]

Issue

Fixes: #3383

Description

Supports computation of body length when fs.ReadStream is created with path of type Buffer.

Testing

Verified that object is successfully uploaded

PutObject without Checksum

import { S3 } from "../aws-sdk-js-v3/clients/client-s3/dist-cjs/index.js";
import { createReadStream } from "fs";

const region = "us-west-2";
const client = new S3({ region });

// File created with command "(for i in {1..1000}; do echo $i "hello world"; done) > hello-world.txt"
const fileName = "hello-world.txt";
const readableStream = createReadStream(Buffer.from(fileName));

const Bucket = "aws-sdk-js-trivikr";
const Key = fileName;
const Body = readableStream;

try {
  await client.putObject({ Bucket, Key, Body });
} catch (error) {
  console.log({ error });
}

PutObject with Checksum

import { S3 } from "../aws-sdk-js-v3/clients/client-s3/dist-cjs/index.js";
import { createReadStream } from "fs";

const region = "us-west-2";
const client = new S3({ region });

// File created with command "(for i in {1..1000}; do echo $i "hello world"; done) > hello-world.txt"
const fileName = "hello-world.txt";
const readableStream = createReadStream(Buffer.from(fileName));

const Bucket = "aws-sdk-js-trivikr";
const Key = fileName;
const Body = readableStream;
const ChecksumAlgorithm = "CRC32";

try {
  await client.putObject({ Bucket, Key, Body, ChecksumAlgorithm });
} catch (error) {
  console.log({ error });
}

Additional context

This PR will be made ready after #3381 is merged. Ready!

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