Implement and evaluate select handler for Spider

Spider's GROUP BY handler (GBH) implementation is one of the prominent sources of the Spider bugs. Implement the select handler for Spider and evaluate if we can replace the existing GBH with the select handler.

The select handler intercepts the query processing much earlier than GBH. I expect that this makes it easier for Spider to generate queries for data nodes.

Related documents:

• The issue description of MDEV-6080, MDEV-22366, MDEV-17631
• The patches implementing the select handler:
  • https://github.com/MariaDB/server/commit/16327fc2e76e9215059894b461e8aca7f989da00
  • https://github.com/MariaDB/server/commit/27c3abde3071ad2010cbcda5b07435ad15364a70
• The ColumnStore implementation of the select handler:
  • https://github.com/mariadb-corporation/mariadb-columnstore-engine/commit/2071716ebd77f9479cbe93733db161aa9791d178
  • https://github.com/mariadb-corporation/mariadb-columnstore-engine/commit/e3d810015024569082ec5efefa1d841d7123bc3d