Fix HTTP/2 build error by implementing RoundTripper adapter

[ghost]

Should allow everything to remain the exact same while being compatible with the new fasthttp modifications.

[Copilot]

Pull Request Overview

This PR fixes the HTTP/2 build error by introducing a new RoundTripper adapter that wraps the client's Do method, ensuring compatibility with the updated fasthttp modifications.

• Introduces a new clientAdapter type implementing the RoundTrip method
• Updates the HTTP client configuration to use the new adapter

Comments suppressed due to low confidence (2)

configure.go:20

• Consider documenting why the adapter always returns false for the retry flag to clarify that retries are not supported via this adapter.

func (ca *clientAdapter) RoundTrip(hc *fasthttp.HostClient, req *fasthttp.Request, resp *fasthttp.Response) (retry bool, err error) {

configure.go:21

• Ensure the clientAdapter behavior is covered by tests to verify correct error propagation from ca.client.Do.

	err = ca.client.Do(req, resp)