[FEATURE] Add system table

[dai-chen]

Currently SQL/PPL is stateless and only serve read-only DQL queries. As we start working on project Querying S3 data, metadata is required to maintain in our plugin. This task is to follow ANSI SQL standard and add system table for later use.

Sub-task include: (no issue created to avoid confusion caused by too fine-grained tasks)

1. Add system table interface and abstraction
2. Add Query status table
3. Add External table metadata table
4. Add Materialized view metadata table
5. Add Materialized view status table