fix: limit HTTP transport tuables to affordable values (#9383)

Close connections pro-actively in transient calls

cmd/prepare-storage.go

@@ -201,12 +201,12 @@ func IsServerResolvable(endpoint Endpoint) error {
 	}
 
 	httpClient := &http.Client{
-		Transport: newCustomHTTPTransport(tlsConfig, rest.DefaultRESTTimeout, rest.DefaultRESTTimeout)(),
+		Transport: newCustomHTTPTransport(tlsConfig, rest.DefaultRESTTimeout)(),
 	}
+	defer httpClient.CloseIdleConnections()
 
 	resp, err := httpClient.Do(req)
 	if err != nil {
-		httpClient.CloseIdleConnections()
 		return err
 	}
 	defer xhttp.DrainBody(resp.Body)