feat: export IamAwsProvider from main minio module

[Anany-k]

Enable direct import of IamAwsProvider class instead of requiring
internal path imports. Users can now use:

import { IamAwsProvider } from 'minio'

Instead of

import {IamAwsProvider} from 'minio/dist/main/IamAwsProvider.js';

[Anany-k]

@prakashsvmx Wanted to check when this will be merged. Thanks

[Anany-k]

Thanks @prakashsvmx .
Could I also check if there is a plan to publish a release soon ?