feat: storage - change reqwest::Client for reqwest_middleware::Client

[nicolas-vivot]

description

This PR replace the use of reqwest::Client by reqwest_middleware::Client.

motivation behind this change

We (in my company) need to perform automatic retry around our GCS requests.
This could be done by adding a wrapper around our use of google-cloud-rust, that would solve the immediate need. But there might be additional need in the near future to enrich requests being made.

benefits

• address the need at the core
• ability to customize both the retry policy and strategy using reqwest-retry and retry-policies with the use of a reqwest-middleware client.
• ability to add custom middlewares to perform in-house logic.
• ability for this library to refactor internal logic and use middleware layers for the authorization header, and any other custom headers.

Feel free to add any constructive comments.

[yoshidan]

Thanks!