[SPARK-3212][SQL] Use logical plan matching instead of temporary tables for table caching

_Also addresses: SPARK-1671, SPARK-1379 and SPARK-3641_

This PR introduces a new trait, `CacheManger`, which replaces the previous temporary table based caching system.  Instead of creating a temporary table that shadows an existing table with and equivalent cached representation, the cached manager maintains a separate list of logical plans and their cached data.  After optimization, this list is searched for any matching plan fragments.  When a matching plan fragment is found it is replaced with the cached data.

There are several advantages to this approach:
 - Calling .cache() on a SchemaRDD now works as you would expect, and uses the more efficient columnar representation.
 - Its now possible to provide a list of temporary tables, without having to decide if a given table is actually just a  cached persistent table. (To be done in a follow-up PR)
 - In some cases it is possible that cached data will be used, even if a cached table was not explicitly requested.  This is because we now look at the logical structure instead of the table name.
 - We now correctly invalidate when data is inserted into a hive table.
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