contracts/scripts: reduce offramp optimizations (#1414)

## Motivation

The offramp was failing to deploy due to too many optimizations causing
a max code size exceeded error.

## Solution

Reduce the number of optimizations by 1.

Also, add a test that deploys v1.6 contracts and ensures that they are
deployable on the simulated backend.

contracts/scripts/native_solc_compile_all_ccip

@@ -10,7 +10,7 @@ SOLC_VERSION="0.8.24"
 OPTIMIZE_RUNS=26000
 OPTIMIZE_RUNS_OFFRAMP=18000
 OPTIMIZE_RUNS_ONRAMP=4100
-OPTIMIZE_RUNS_MULTI_OFFRAMP=2000
+OPTIMIZE_RUNS_MULTI_OFFRAMP=1999
 
 
 SCRIPTPATH="$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"

core/gethwrappers/ccip/deployment_test/deployment_test.go

@@ -0,0 +1,97 @@
+package deploymenttest
+
+import (
+	"math/big"
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/accounts/abi/bind/backends"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/stretchr/testify/require"
+
+	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/assets"
+	"github.com/smartcontractkit/chainlink/v2/core/gethwrappers/ccip/generated/fee_quoter"
+	"github.com/smartcontractkit/chainlink/v2/core/gethwrappers/ccip/generated/nonce_manager"
+	"github.com/smartcontractkit/chainlink/v2/core/gethwrappers/ccip/generated/offramp"
+	"github.com/smartcontractkit/chainlink/v2/core/gethwrappers/ccip/generated/onramp"
+	"github.com/smartcontractkit/chainlink/v2/core/gethwrappers/ccip/generated/router"
+	"github.com/smartcontractkit/chainlink/v2/core/gethwrappers/ccip/generated/token_admin_registry"
+	"github.com/smartcontractkit/chainlink/v2/core/internal/testutils"
+)
+
+// This tests ensures that all of the compiled contracts can be
+// deployed to an actual blockchain (i.e no "max code size exceeded" errors).
+// It does not attempt to correctly set up the contracts, so bogus inputs are used.
+func TestDeployAllV1_6(t *testing.T) {
+	owner := testutils.MustNewSimTransactor(t)
+	chain := backends.NewSimulatedBackend(core.GenesisAlloc{
+		owner.From: {Balance: assets.Ether(100).ToInt()},
+	}, 30e6)
+
+	// router
+	_, _, _, err := router.DeployRouter(owner, chain, common.HexToAddress("0x1"), common.HexToAddress("0x2"))
+	require.NoError(t, err)
+	chain.Commit()
+
+	// nonce manager
+	_, _, _, err = nonce_manager.DeployNonceManager(owner, chain, []common.Address{common.HexToAddress("0x1")})
+	require.NoError(t, err)
+	chain.Commit()
+
+	// offramp
+	_, _, _, err = offramp.DeployOffRamp(owner, chain, offramp.OffRampStaticConfig{
+		ChainSelector:      1,
+		Rmn:                common.HexToAddress("0x1"),
+		TokenAdminRegistry: common.HexToAddress("0x2"),
+		NonceManager:       common.HexToAddress("0x3"),
+	}, offramp.OffRampDynamicConfig{
+		FeeQuoter:                               common.HexToAddress("0x4"),
+		PermissionLessExecutionThresholdSeconds: uint32((8 * time.Hour).Seconds()),
+		MaxTokenTransferGas:                     50_000,
+		MaxPoolReleaseOrMintGas:                 50_000,
+		MessageValidator:                        common.HexToAddress("0x5"),
+	}, nil)
+	require.NoError(t, err)
+	chain.Commit()
+
+	// onramp
+	_, _, _, err = onramp.DeployOnRamp(owner, chain, onramp.OnRampStaticConfig{
+		ChainSelector:      1,
+		Rmn:                common.HexToAddress("0x1"),
+		NonceManager:       common.HexToAddress("0x2"),
+		TokenAdminRegistry: common.HexToAddress("0x3"),
+	}, onramp.OnRampDynamicConfig{
+		FeeQuoter:        common.HexToAddress("0x4"),
+		MessageValidator: common.HexToAddress("0x5"),
+		FeeAggregator:    common.HexToAddress("0x6"),
+		AllowListAdmin:   common.HexToAddress("0x7"),
+	}, nil)
+	require.NoError(t, err)
+	chain.Commit()
+
+	// fee quoter
+	_, _, _, err = fee_quoter.DeployFeeQuoter(
+		owner,
+		chain,
+		fee_quoter.FeeQuoterStaticConfig{
+			MaxFeeJuelsPerMsg:  big.NewInt(1e18),
+			LinkToken:          common.HexToAddress("0x1"),
+			StalenessThreshold: 10,
+		},
+		[]common.Address{common.HexToAddress("0x1")},
+		[]common.Address{common.HexToAddress("0x2")},
+		[]fee_quoter.FeeQuoterTokenPriceFeedUpdate{},
+		[]fee_quoter.FeeQuoterTokenTransferFeeConfigArgs{},
+		[]fee_quoter.FeeQuoterPremiumMultiplierWeiPerEthArgs{},
+		[]fee_quoter.FeeQuoterDestChainConfigArgs{})
+	require.NoError(t, err)
+	chain.Commit()
+
+	// token admin registry
+	_, _, _, err = token_admin_registry.DeployTokenAdminRegistry(owner, chain)
+	require.NoError(t, err)
+	chain.Commit()
+
+	// TODO: add rmn home and rmn remote
+}