Add output plugins for popular cloud object storage (s3, gcs, azurestorage)

**Is your feature request related to a problem? Please describe.**
Fluentd offers output plugins for popular cloud object storage such as s3, gcs, and azurestorage.
It would be nice to have similar functionality for Fluent-bit.

**Describe the solution you'd like**
An output plugin for each of the following:
- AWS S3 - Send logs to an S3 bucket
- Google GCS - Send logs to a GCS bucket
- Azure storage - Send logs to an Azure blob

**Describe alternatives you've considered**
Currently the easiest way to send logs from Fluent-bit to object store is to use the forwarding output plugin for Fluent-bit to forward the logs to a central Fluentd instance, and then use the Fluentd output plugins to send the logs to object store buckets/blobs.
Alternatively, we can use the HTTP output plugin for Fluent-bit to send the logs to our own central service that writes them to object storage.
Neither solutions are ideal as they require additional resources (Fluentd introduces a Ruby dependency, etc).