feat(e2e): add vm without main network test (#1968)

Description
Adds E2E test coverage for VirtualMachines configured with only an additional network (ClusterNetwork) and no Main network interface. This validates a previously untested scenario where VMs operate without the default Main network.

---------

Signed-off-by: Daniil Antoshin <daniil.antoshin@flant.com>

Author: danilrwx

test/e2e/default_config.yaml

@@ -25,7 +25,6 @@ testData:
   vdSnapshots: "/tmp/testdata/vd-snapshots"
   sshKey: "/tmp/testdata/sshkeys/id_ed"
   sshUser: "cloud"
-  vmVpc: "/tmp/testdata/vm-vpc"
 logFilter:
   - "pattern to exclude"
   - "validation failed for data source objectref" # Err.

test/e2e/internal/config/config.go

@@ -93,7 +93,6 @@ type TestData struct {
 	VdSnapshots        string `yaml:"vdSnapshots"`
 	Sshkey             string `yaml:"sshKey"`
 	SSHUser            string `yaml:"sshUser"`
-	VMVpc              string `yaml:"vmVpc"`
 }
 
 type StorageClass struct {