Restore the workspace reqwest default feature stack for RustFS outbound HTTPS clients, while keeping per-crate extra APIs such as json, stream, and multipart explicit. Lazily initialize the notification runtime from admin target access when RUSTFS_NOTIFY_ENABLE=true is already effective, and add regression coverage for HTTPS webhook custom CA handling and target-list visibility.
Fixes#5052.
Co-authored-by: heihutu <heihutu@gmail.com>
Register the webhook target while its endpoint is reachable, then drop
the listener before the PUT: registering against a dead endpoint stalls
behind the reachability probe timeout and flaked the ARN wait on the
rustfs#4821 merge run. Also widen the registration wait to 20s.
Zhengchao An