[SQLite] dropChecks not supported

[barakplasma]

knex/test/unit/schema-builder/sqlite3.js

Lines 4641 to 4651 in 864530c

	it('drop checks', function () {
	tableSql = client
	.schemaBuilder()
	.table('user', function (t) {
	t.dropChecks(['check_constraint1', 'check_constraint2']);
	})
	.toSQL();
	expect(tableSql[0].sql).to.equal(
	'alter table `user` drop constraint check_constraint1, drop constraint check_constraint2'
	);
	});

will always fail since there isn't support for alter table foo drop constraint in sqlite3 directly.

$ sqlite3
SQLite version 3.37.2 2022-01-06 13:25:41
Enter ".help" for usage hints.
Connected to a transient in-memory database.
Use ".open FILENAME" to reopen on a persistent database.
sqlite> create table foo (id integer primary key, bar integer check(bar > 1));
sqlite> insert into foo values (1, 2);
sqlite> insert into foo values (1, -1);
Error: stepping, CHECK constraint failed: bar > 1 (19)
sqlite> alter table foo drop constraint;
Error: in prepare, near "constraint": syntax error (1)
sqlite> alter table foo drop constraint bar;
Error: in prepare, near "constraint": syntax error (1)
sqlite> alter table foo drop constraint 1;
Error: in prepare, near "constraint": syntax error (1)
sqlite> 

relates to #4874