Summary:
`ConcreteComponentDescriptor` is a major place where dynamic dispatch calls end up. We see some amount of crashes that can be caused by an invalid pointer to a ComponentDescriptor, those checks can help verify this theory. Anyway, it's a good practice to fail earlier.
Changelog: [Internal] - Stability improvements (Fabric)
Reviewed By: sammy-SC
Differential Revision: D17991515
fbshipit-source-id: 1cac372a12b49430a3d1db66c8fc673e6adc32e9