refactor(runtime): "Worker::execute_script" returns value

[gofenix]

This PR is for #16065

Now, the execute_script:

  /// See [JsRuntime::execute_script](deno_core::JsRuntime::execute_script)
  pub fn execute_script(
    &mut self,
    script_name: &str,
    source_code: &str,
  ) -> Result<(), AnyError> {
    self.js_runtime.execute_script(script_name, source_code)?;
    Ok(())
  }

I think we can get the value from execute_script function.

  pub fn execute_script(
    &mut self,
    script_name: &str,
    source_code: &str,
  ) -> Result<v8::Global<v8::Value>, AnyError> {
    self.js_runtime.execute_script(script_name, source_code)
  }

[CLAassistant]

All committers have signed the CLA.

[bartlomieju]

LGTM, thanks @zhenfeng-zhu