Toxiproxy client setup timeout on API operation

[miry]

Check that toxiproxy client timeouted on requests.
Similar to server side to setup timeouts in #416

References:

• Toxiproxy hangs indefinitely while removing toxicity #412
• toxiproxy api hangs when trying to do anything after a long wait, run from inside testcontainers #254

[miry]

Fixed in https://github.com/Shopify/toxiproxy/pull/441/files#diff-bd3a55a72186f59e2e63efb4951573b2f9e4a7cc98086e922b0859f8ccc1dd09R33-R35