Core: Fix caching table with metadata table names

[manuzhang]

When CachingCatalog finds a table having a MetadataTableType as its identifier name, it will load its namespace as a normal table. However, spark_catalog.default.history is a valid table identifier, although having MetadataTableType as its name. In this case, CachingCatalog throws NoSuchTableException currently. This PR catches the exception and load the table as a normal table.

cc @wypoon @ajantha-bhat