fixup: Enable private network configuration

tests/e2e/c/dynamic_fees.go

@@ -37,7 +37,10 @@ var _ = e2e.DescribeCChain("[Dynamic Fees]", func() {
 
 	ginkgo.It("should ensure that the gas price is affected by load", func() {
 		ginkgo.By("creating a new private network to ensure isolation from other tests")
-		privateNetwork := e2e.Env.NewPrivateNetwork("avalanchego-e2e-dynamic-fees")
+		privateNetwork := &tmpnet.Network{
+			Owner: "avalanchego-e2e-dynamic-fees",
+		}
+		e2e.Env.NewPrivateNetwork(privateNetwork)
 
 		ginkgo.By("allocating a pre-funded key")
 		key := privateNetwork.PreFundedKeys[0]

tests/fixture/e2e/env.go

@@ -155,22 +155,17 @@ func (te *TestEnvironment) NewKeychain(count int) *secp256k1fx.Keychain {
 }
 
 // Create a new private network that is not shared with other tests.
-func (te *TestEnvironment) NewPrivateNetwork(networkOwner string) *tmpnet.Network {
+func (te *TestEnvironment) NewPrivateNetwork(network *tmpnet.Network) {
 	// Use the same configuration as the shared network
 	sharedNetwork, err := tmpnet.ReadNetwork(te.NetworkDir)
 	te.require.NoError(err)
 
 	pluginDir, err := sharedNetwork.DefaultFlags.GetStringVal(config.PluginDirKey)
 	te.require.NoError(err)
 
-	network := &tmpnet.Network{
-		Owner: networkOwner,
-	}
 	StartNetwork(
 		network,
 		sharedNetwork.DefaultRuntimeConfig.AvalancheGoPath,
 		pluginDir,
 	)
-
-	return network
 }