api: Log errors when executing setup and teardown

This commit adds error logging when executing the setup and teardown
functions in the k6 API. If an error occurs during setup or teardown, it
will now be logged with the corresponding error message. This improves
error reporting and makes it easier to diagnose issues related to setup
and teardown.

Related issue: #2422

api/v1/setup_teardown_routes.go

@@ -71,6 +71,7 @@ func handleRunSetup(cs *ControlSurface, rw http.ResponseWriter, r *http.Request)
 	runner := cs.RunState.Runner
 
 	if err := cs.RunState.Runner.Setup(r.Context(), cs.Samples); err != nil {
+		cs.RunState.Logger.WithError(err).Error("Error executing setup")
 		apiError(rw, "Error executing setup", err.Error(), http.StatusInternalServerError)
 		return
 	}
@@ -81,6 +82,7 @@ func handleRunSetup(cs *ControlSurface, rw http.ResponseWriter, r *http.Request)
 // handleRunTeardown executes the runner's Teardown() method
 func handleRunTeardown(cs *ControlSurface, rw http.ResponseWriter, r *http.Request) {
 	if err := cs.RunState.Runner.Teardown(r.Context(), cs.Samples); err != nil {
+		cs.RunState.Logger.WithError(err).Error("Error executing teardown")
 		apiError(rw, "Error executing teardown", err.Error(), http.StatusInternalServerError)
 	}
 }