proxy: remove auth info from http conn info & fixup jwt api trait (#9047)

misc changes split out from #8855 

- **allow cloning the request context in a read-only fashion for
background tasks**
- **propagate endpoint and request context through the jwk cache**
- **only allow password based auth for md5 during testing**
- **remove auth info from conn info**

proxy/src/console/provider.rs

@@ -303,6 +303,7 @@ impl NodeInfo {
 
     pub(crate) fn set_keys(&mut self, keys: &ComputeCredentialKeys) {
         match keys {
+            #[cfg(any(test, feature = "testing"))]
             ComputeCredentialKeys::Password(password) => self.config.password(password),
             ComputeCredentialKeys::AuthKeys(auth_keys) => self.config.auth_keys(*auth_keys),
             ComputeCredentialKeys::None => &mut self.config,