Allow for default messages if cookies are not allowed

[mrk-j]

Maybe we can add default views for when cookies are not accepted. So we can do something like this:

@cookieConsentMarketing
    <iframe width="560" height="315" src="https://www.youtube.com/embed/fzQSE_3eLKk" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
@endShowGiveMarketingConsentWarning

Or maybe use syntax like this:

@cookieConsentMarketing
    <iframe width="560" height="315" src="https://www.youtube.com/embed/fzQSE_3eLKk" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
@else
    @showGiveMarketingConsentWarning
@endcookieConsentMarketing

The blade can contain something like this:

Please allow marketing cookies to view this video. Click <a href="javascript: Cookiebot.renew()">here</a> to renew or change your cookie consent.

We can then override this on a per project basis to include styling:

<div class="alert alert-warning">
    Please allow marketing cookies to view this video. Click <a href="javascript: Cookiebot.renew()">here</a> to renew or change your cookie consent.
</div>