Users of our http_client crate knew they were interacting with isahc as they set its extensions on the request. This change adds our own equivalents for their APIs in preparation for changing the default http client. Release Notes: - N/A
isahc_http_client
This PR does some clean up after #15446. Release Notes: - N/A
Fixes: #15599 Release Notes: - N/A --------- Co-authored-by: Mikayla <mikayla@zed.dev> Co-authored-by: Conrad <conrad@zed.dev>