fix: respect http_proxy env vars in CLI API client (#695) #744

Job	Run time
build-freebuff	1m 26s
build-and-smoke-freebuff-windows	3m 1s
e2e-startup	1m 6s
e2e-help-command	1m 14s
e2e-ads-behavior	1m 22s
e2e-version	52s
e2e-slash-commands	1m 3s
e2e-agent-startup	2m 14s
e2e-terminal-command	51s
e2e-code-edit	1m 4s
	14m 13s

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