MongoDB watchdog D10 Support

Weird, that was supposed to have been fixed long ago. I'll check later today.

Not sure why you need that patch: these signatures were already changed 10 months ago, as you can see on https://git.drupalcode.org/project/mongodb/-/blame/8.x-2.x/modules/mongo...

The : bool and : iterable return hints are already present in 8.x-2.x-dev, as you can see on https://git.drupalcode.org/project/mongodb/-/blob/8.x-2.x/modules/mongod...

Are you sure you actually used a current 8.x-2.x-dev instead of an older version like 8.x-2.0-alpha2, which doesn't include that fix.

Beyond that, your patch includes a reference to the Symfony ValueResolverInterface which does not exist in D9 and is just a subset of the ArgumentValueResolverInterface anyway. Why do you think it should be added ?

I cannot really see the use for the extra implements and the fix was already merged almost one year ago, so marking won't fix.