Expire IDs of deleted Apex classes/triggers and VF pages/components from caches on delete

If you delete an Apex class/trigger or VF page/component using IC right now and then try to recreate that object, you'll get an INVALID_CROSS_REFERENCE_KEY error on the first deployment. This is because of the full name-to-ID caches maintained by the Tooling API deployer. When IC is used to delete metadata, all affected caches should be updated accordingly.