SQLite feature parity

[adamziel]

Let's make sure the SQLite integration works well for the entirety of WordPress core and the most popular plugins.

Remaining work

• Support SHOW TABLE STATUS sqlite-database-integration#75
• Support GROUP_CONCAT sqlite-database-integration#70
• Support SHOW CREATE TABLE sqlite-database-integration#74
• Can’t place orders in Woo when HPOS is enabled #731
• bbPress and WooCommerce extensions not working #663
• [Database] Exported and hosted Playground site can't connect to Jetpack #708
• PHP warnings from SQLite integration #159
• Expand the sqlite-database-integration test suite
• Eventually: Consider running the entire WordPress core unit tests suite as a part of the CI run of sqlite-database-integration
• Eventually: Identify 100 most popular plugins and find a way to test their compatibility with Playground and SQLite. Collecting error information from the WP.org plugin preview could help.

Nice to haves

• Evaluate SQLite object cache #207