Remove gmock/gtest depepdency from ext::http::client::nosend

[lalitb]

As discussed here, it would be good to remove gmock/gtest dependency from ext::http::client::nosend.

One option could be - We do plan to modify EventHandler::OnEvent to return the client implementation data at various phases of http(s) request handling if we can use that to return the Request object and validate for tests.

[github-actions]

This issue was marked as stale due to lack of activity. It will be closed in 7 days if no furthur activity occurs.

[owent]

Also, nosend shoube be installed when using cmake.

[github-actions]

This issue was marked as stale due to lack of activity.