feat(clone) Check for & use cloneOf method when cloning objects

[stieg]

Adds a check in the clone function to see if the given parameter has
a cloneOf method. If the method exists then the clone method
assumes that this method will return a clone of the called object and
thus invokes it to complete its task.

Fixes #8299

[stieg]

@vkarpov15 The failure of the CI appears to be unrelated to this change. Looking for feedback on this when you have a moment. This PR currently blocks any resolution to mongoosejs/mongoose-double#7 so as soon as a path forward is cleared here I can move forward with PRs for that project. Cheers.

[vkarpov15]

I don't think I can merge this, especially in a patch release. cloneOf() simply isn't a well established enough concept for me to justify putting it this deep in the codebase. Too many potential surprises if people pass in objects that define a cloneOf() function.

I haven't had a chance to look into #8299 enough yet to see whether it is viable for us to handle cloning doubles in a way that doesn't involve adding another property to the double type. But one alternative would be for Mongoose to export a clone symbol that mongoose-double could then use to expose a function that Mongoose could use to clone doubles, so we wouldn't conflict with user-defined cloneOf() functions.

[stieg]

I agree with your assessment above and the potential proposed solution. Question I have is if I put something like that together are you ready to review/accept it or do you simply need more time to review #8299 before even considering it. I would like to drive this issue to a conclusion soon as is reasonably possible but first I need your blessing on the solution path before I can do so. LMK.