Upgraded django-recaptcha to 4.0.0. (🎶 one more time 🎶 )

[bmispelon]

OK folks, I think this one might stick.

I tested it locally by getting my own recaptcha keys and I can then see that the captcha is validated (I get an error from stripe which seems to indicate that things will work once in production: No such product: 'dummy_monthly_id').

There were three things I had to change compared to the original commit 16787c8:

• Work around django-recaptcha automatically submitting the form (Issue with django-recapture v4 and form submit event listeners django-recaptcha/django-recaptcha#348) by disabling their onsubmit event and doing the call to grecaptcha.execute(...) manually.
• Make sure to set the returned token value to the captcha form field (this part was missing in my previous attempt 901bdd9
• Make sure that both the widget declared on the form and the js use the same action, otherwise the captcha validation fails (this was also missing in my previous attempt).

I've got a good feeling about this one 🤞🏻

EDIT I had to fix some tests that were breaking because the recaptcha test keys don't work with a custom action as documented in https://github.com/django-recaptcha/django-recaptcha/?tab=readme-ov-file#local-development-and-functional-testing

[felixxm]

Thanks 👍

Merged in 3179425.