New cost model for signatures

[0x0ece]

The cost model for signatures changed:
https://github.com/anza-xyz/agave/blob/v2.0.1/cost-model/src/cost_model.rs#L53

vs

firedancer/src/flamenco/runtime/fd_runtime.c

Lines 2652 to 2667 in f383c75

	for (ushort i = 0; i < txn_descriptor->instr_cnt; ++i)
	{
	fd_txn_instr_t const *txn_instr = &txn_descriptor->instr[i];
	fd_pubkey_t *program_id = &txn_ctx->accounts[txn_instr->program_id];
	if (memcmp(program_id->uc, fd_solana_keccak_secp_256k_program_id.key, sizeof(fd_pubkey_t)) == 0 ||
	memcmp(program_id->uc, fd_solana_ed25519_sig_verify_program_id.key, sizeof(fd_pubkey_t)) == 0)
	{
	if (txn_instr->data_sz == 0)
	{
	continue;
	}
	uchar *data = (uchar *)txn_raw->raw + txn_instr->data_off;
	num_signatures = fd_ulong_sat_add(num_signatures, (ulong)(data[0]));
	}
	}
	double signature_fee = (double)fd_runtime_lamports_per_signature(&txn_ctx->slot_ctx->slot_bank) * (double)num_signatures;

cc @jumpsiegel