Consolidate MaxWasmSize constraints into a single var (#826)

* Convert MaxWasmSize to var

Also removes redundant maxWasmSize param

* Convert MaxWasmSize to int

* Update CHANGELOG

* Complete max wasm size changes

* Update compile flags

Co-authored-by: Cole Brown <bigswim@gmail.com>

x/wasm/keeper/keeper_test.go

@@ -126,7 +126,6 @@ func TestCreateStoresInstantiatePermission(t *testing.T) {
 			keepers.WasmKeeper.SetParams(ctx, types.Params{
 				CodeUploadAccess:             types.AllowEverybody,
 				InstantiateDefaultPermission: spec.srcPermission,
-				MaxWasmCodeSize:              types.DefaultMaxWasmCodeSize,
 			})
 			fundAccounts(t, ctx, accKeeper, bankKeeper, myAddr, deposit)