enhancement: make timeout configurable for bento cloud pulls

[holzweber]

Describe the bug

I try to load a bento with 50 models from yatai. I always run into timeouts.
If it would be possible to set the timeout configuration in the Client, the error would be solved:

BentoML/src/bentoml/_internal/cloud/client.py

Line 854 in e1a40cc

self.session = httpx.Client(timeout=60)

To reproduce

bentoml pull myBento:r6lk63tamwm7dit7 --verbose

Expected behavior

Download the bento without timeout

Environment

bentoml: v1.3.2
platform: windows