[amp-story] Render timeout even when render is not requested

### Description

If I start a story in visibilityState `inactive` or `hidden`, if I wait too long to set it to `prerender`, I will get an error `Render timeout waiting for service amp-story-render to be ready.`.
Then, if I set it's visibilityState to `prerender`, it won't work.

### Reproduction Steps

On this sandbox, you can try to change the story visibilityState : https://z9ce0.csb.app/

- wait for console Error `Render timeout waiting for service amp-story-render to be ready.`
- change visiblityState to prerender

compare to

- change visiblityState to prerender before console Error `Render timeout waiting for service amp-story-render to be ready.`

### Relevant Logs

_No response_

### Browser(s) Affected

_No response_

### OS(s) Affected

_No response_

### Device(s) Affected

_No response_

### AMP Version Affected

_No response_

Start with the reproduction sandbox at https://z9ce0.csb.app/ and observe the amp-story visibilityState transition from inactive or hidden to prerender after the timeout. Trace the amp-story render lifecycle around the `amp-story-render` readiness timeout. Done means setting visibilityState to prerender after the timeout works without the reported error.

Written by the indexing model from the issue text.