Backup batches to a separate table when batches table get emptied

[Stefan-Ethernal]

The PR introduces the batch_data_backup to the state_db, which creates backup of all the batches in case the trusted state gets resetted as part of the fork id upgrade.

cdk-validium-node/state/pgstatestorage/pgstatestorage.go

Lines 71 to 78 in 37a4fb0

	func (p *PostgresStorage) ResetTrustedState(ctx context.Context, batchNumber uint64, dbTx pgx.Tx) error {
	const resetTrustedStateSQL = "DELETE FROM state.batch WHERE batch_num > $1"
	e := p.getExecQuerier(dbTx)
	if _, err := e.Exec(ctx, resetTrustedStateSQL, batchNumber); err != nil {
	return err
	}
	return nil
	}