fix(lib-storage): fix fs error on browsers when using lib-storage upload

[ajredniwja]

Issue

Issue number, if available, prefixed with "#"
fixes: #2136, #2156

Description

What does this implement/fix? Explain your changes.

Testing

How was this change tested?
Ran manual tests on browser and in node

Browser code:

(async () => {
    const creds = fromCognitoIdentityPool({
        client: new CognitoIdentityClient({ region }),
        identityPoolId: idPool,
    });
    const client = new S3Client({
        region,
        credentials: creds
    });



    const Key = `${Date.now()}-new-key`;
    let upload = new Upload({
        client,
        tags: [{
            Key: "my-tag-key",
            Value: "my-tag-value"
        }],
        params: { Key, Bucket,
            Body: "hello world!"
        }
    }); 

    upload.on("httpUploadProgress", (progress ) => {
        console.log(progress);
    });

    const uploadResult = await upload.done();
    
    console.log(uploadResult);

})();

Node:

(async () => {
    const fs = require("fs");
    const { S3  } = require("@aws-sdk/client-s3");
    const { Upload } = require("@aws-sdk/lib-storage")
    const client = new S3({
      region: "us-west-2",
    });
    try {
      const upload = new Upload({
        client,
        params: {
          Bucket: "bucket",
          Key: "docket",
          Body: fs.createReadStream("/path/to/file")
        }
      });

      upload.on("httpUploadProgress", (progress ) => {
        console.log(progress);
      });

      const result = await upload.done();
      console.log(result)
    } catch(e) {
      console.log(e);
    }
  })();

Additional context

Add any other context about the PR here.

cc @alexforsyth

---

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• Commit ID: 45999f0
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[alexforsyth]

nit due to naming, LGTM

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