[TEST] Use nock instead of jest for captcha mocking

Use this code in `test/utils.ts` to mock the captcha with `nock`.

```ts
export function mockCaptchaValidationOnce(action: RecaptchaActionType) {
nock('https://www.google.com').get('/recaptcha/api/siteverify').query(true).reply(200, {
success: true,
action,
score: 1,
});
}
export function mockCaptchaValidationWithScore(action: RecaptchaActionType, score: number) {
nock('https://www.google.com').get('/recaptcha/api/siteverify').query(true).reply(200, {
success: true,
action,
score,
});
}
```