Fix #3998: insert stmt with 'default values' doesn't work in SQLite

[ororsatti]

Issue

Fixes #3998

Description

Fixing 2 issues:

• insert statement with 'default values': insert into <table_name> default values;
• insert statement with 'default values' and a returning statement: insert into <table_name> default values returning *;

The sqlite parser grammer was incorrect.

Tests

• tested locally
• added insert with values test case

[ororsatti]

I would also suggest taking a look on the new Sqlite parser grammar by Antlr: https://github.com/antlr/grammars-v4/tree/master/sql/sqlite

I can migrate.