NO_PROXY not supported

While this toolkit supports the HTTP_PROXY and HTTPS_PROXY environment variables, it does not support the NO_PROXY environment variable. In a corporate environment, this can cause issues when your transfer needs to bypass the firewall.

It looks like the completeProxySetup function in awsConnectionParameters.ts should be updated to pull process.env.NO_PROXY into the proxyConfiguration.

I consider the lack of NO_PROXY to be a bug, not a feature, but feel free to move this to a feature request if you disagree.
Thank you.

Start in awsConnectionParameters.ts at completeProxySetup and inspect how HTTP_PROXY and HTTPS_PROXY are read into proxyConfiguration. Add equivalent handling for process.env.NO_PROXY, then verify that the resulting proxy configuration includes the bypass setting when the environment variable is present.

Written by the indexing model from the issue text.