SQLite does NOT support sequence reset.

This happened to work before, because primary key columns in SQLite just
used the rowid, and the same row was reused by a subsequent insert, so it
got the same primary key number even without resetting the sequence. Now
that we use a real AUTOINCREMENT column in SQLite, it doesn't reuse
previously used IDs, and we can't reset the sequence, so
test_runner.tests.AutoIncrementResetTest.test_autoincrement_reset2 fails
unless we set supports_sequence_reset to False to skip it.