amp-recatcha document request is blocked because of Cross-Origin-Embedder-Policy

### Description

I'm trying to use `amp-recaptcha` in a very basic `form`. Seems like the `iframe` request is blocked because of `Cross-Origin-Embedder-Policy` and as result, the form is unable to be used. `Allow this key to work with AMP pages` is checked on reCAPTCHA.

### Reproduction Steps

Import the `amp-recaptcha` script in `head`:

```html

```

In `body` add a `form`:

```html

Abonează-te

```

A live example can be found on https://afaceridigitalizate.ro/amp/ using the Newsletter form (id="newsletter") in the `footer`.

### Relevant Logs

```shell
Chrome warns that Cross-Origin-Embedder-Policy is not set:
To embed this frame in your document, the response needs to enable the cross-origin embedder policy by specifying the following response header:
`Cross-Origin-Embedder-Policy: require-corp`
```

### Browser(s) Affected

Chrome, Firefox

### OS(s) Affected

Windows 10

### Device(s) Affected

_No response_

### AMP Version Affected

2303151529000

Start by reproducing the Newsletter form on the linked live AMP page in Chrome or Firefox, then inspect the amp-recaptcha-input-0.1.js component and the browser's Cross-Origin-Embedder-Policy warning. Done means the amp-recaptcha iframe request is no longer blocked and the newsletter form can be submitted in the reported setup.

Written by the indexing model from the issue text.