assert upstream proxy does the traffic

[Choraden]

The assert only works for http endpoints.

[what-the-diff]

PR Summary

• New Naming Feature in HTTPProxyConfig
  The HTTPProxyConfig, a part of our system configuration setup, now has a new functionality named 'name'. This update enhances our system's flexibility by adding new configurational controls.

• Environment Variable Inclusion in UpstreamProxyService
  The 'UpstreamProxyService' function, which handles sending our data upstream, now includes the environment variable 'FORWARDER_NAME'. This means our upstream service will now have access to more specific system information.

• Integration of 'runUpstream' Constant with Default and AuthSetups
  Both the DefaultsSetups and AuthSetups functions in our testing setup now include a new constant named 'runUpstream'. This inclusion helps improve our testing accuracy when evaluating upstream processes in both default and authorized setups.

• Upstream Check Test Function Addition
  A new test function named 'TestUpstreamCheck' has been added to our proxy tests. This function helps ensure the correctness and efficiency of our new upstream functionalities.

• New 'Name' Field Added to HTTPProxyConfig
  Along with the 'name' functionality, a new 'Name' field has also been added to the HTTPProxyConfig struct. This change is aimed at augmenting our system's configurability by presenting more labeling options.

• Modification in 'Request' Method
  The 'Request' method in our httpexpect utility has now been tweaked to return a 'Response' struct, providing a more descriptive outcome compared to the previous 'resp'. This adjustment enhances the understandability of the method's output.

[mmatczuk]

Can we call this test TestProxyUpstream and given the env variables it would ensure that upstream proxy is either used or not.