No option to set `no_proxy` and `NO_PROXY` env var is not read with the current version of reqwest.

**Describe the bug**

- we have a proxy which stops the context-length header. This causes issue, and I would prefer to not use the proxy. With object-store, its not possible to set `Client.no_proxy()` in reqwest.

I am happy to add a config for that.
**To Reproduce**

**Expected behavior**

**Additional context**

Start by tracing how the object-store client configures reqwest and whether the Client.no_proxy() entry point or proxy environment handling is exposed. Reproduce the proxy case described in the issue, then verify that an explicit no-proxy option and the NO_PROXY environment variable produce the expected direct-request behavior.

Written by the indexing model from the issue text.