Fix compatibility with k6 after integration tests refactor

See grafana/k6#2821 (comment)

environment.go

@@ -305,14 +305,17 @@ type goModTemplateContext struct {
 const mainModuleTemplate = `package main
 
 import (
+	"context"
+
 	k6cmd "{{.K6Module}}/cmd"
+	k6state "{{.K6Module}}/cmd/state"
 
 	// plug in k6 modules here
 	// TODO: Create /modules/standard dir structure?
 	// _ "{{.K6Module}}/modules/standard"
 )
 
 func main() {
-	k6cmd.Execute()
+	k6cmd.Execute(k6state.NewGlobalState(context.Background()))
 }
 `