Add api to get table stats via restapi

It will be very helpful, if api is added to get table stats , like offline segment count, online segment count, table creation time, table modified time , offline ingestion job time(time at which ingestion job triggered/finished) etc.,

Thanks

The issue names no files, tests, or entry points. Start by locating Pinot’s existing REST API for table metadata and the sources of the requested segment, table-time, and ingestion-job statistics. Done means the API exposes the requested table statistics with behavior verified by tests.

Written by the indexing model from the issue text.