feat: handle fallthrough attributes in built-in components consistently

[ferferga]

This is a naive approach for vuejs/rfcs#664

Why it's naive?
Given Suspense and Teleport are not "real" components but abstractions for Vue's renderer, this is probably not the best approach because:

• Props are manually handled and defined in a top-level array in the module definition, unlike Transition and KeepAlive which use a normal setup context
• The fallthrough is manual, which means that might be slower than the already really audited renderer and it might not take into account all edge cases when updating
• Forcefully needs to use cloneVNode as, we're doing a workaround around the "workaround" that these 2 special components are.
• Warning Extraneous non-props attributes were passed to component... will still be displayed during development, given componentRenderUtils is unaware that we're "hacking" this already manually.

See also the comment I added to the codebase.

I'm leaving this open as a draft to gather feedback and some insights in how this could be done better, so later on I can keep going with Teleport, TransitionGroup and tests.

Checklist

• Suspense
• Teleport
• TransitionGroup
• Unit tests
• E2E tests