Fix validation test compilation errors

Update validation tests to use new NewNebiusCredential signature:
- validation_kubernetes_test.go: Use NEBIUS_SERVICE_ACCOUNT_JSON and NEBIUS_TENANT_ID
- validation_network_test.go: Use NEBIUS_SERVICE_ACCOUNT_JSON and NEBIUS_TENANT_ID

The new credential format expects:
- serviceAccountJSON: JSON service account key (or file path)
- tenantID: Nebius tenant ID

Previous format used individual credential components which have been consolidated.

Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

Author: liveaverage

v1/providers/nebius/validation_kubernetes_test.go

@@ -11,18 +11,21 @@ import (
 )
 
 func TestKubernetesValidation(t *testing.T) {
+	isValidationTest := os.Getenv("VALIDATION_TEST")
 	if isValidationTest == "" {
 		t.Skip("VALIDATION_TEST is not set, skipping Nebius Kubernetes validation tests")
 	}
 
 	testUserPrivateKeyPEMBase64 := os.Getenv("TEST_USER_PRIVATE_KEY_PEM_BASE64")
+	serviceAccountJSON := os.Getenv("NEBIUS_SERVICE_ACCOUNT_JSON")
+	tenantID := os.Getenv("NEBIUS_TENANT_ID")
 
-	if privateKeyPEMBase64 == "" || publicKeyID == "" || serviceAccountID == "" || projectID == "" {
-		t.Fatalf("NEBIUS_PRIVATE_KEY_PEM_BASE64, NEBIUS_PUBLIC_KEY_ID, NEBIUS_SERVICE_ACCOUNT_ID, and NEBIUS_PROJECT_ID must be set")
+	if serviceAccountJSON == "" || tenantID == "" {
+		t.Fatalf("NEBIUS_SERVICE_ACCOUNT_JSON and NEBIUS_TENANT_ID must be set")
 	}
 
 	config := validation.ProviderConfig{
-		Credential: NewNebiusCredential(fmt.Sprintf("validation-%s", t.Name()), publicKeyID, privateKeyPEMBase64, serviceAccountID, projectID),
+		Credential: NewNebiusCredential(fmt.Sprintf("validation-%s", t.Name()), serviceAccountJSON, tenantID),
 	}
 
 	// Use the test name as the name of the cluster and node group

v1/providers/nebius/validation_network_test.go

@@ -10,24 +10,22 @@ import (
 )
 
 var (
-	isValidationTest    = os.Getenv("VALIDATION_TEST")
-	privateKeyPEMBase64 = os.Getenv("NEBIUS_PRIVATE_KEY_PEM_BASE64")
-	publicKeyID         = os.Getenv("NEBIUS_PUBLIC_KEY_ID")
-	serviceAccountID    = os.Getenv("NEBIUS_SERVICE_ACCOUNT_ID")
-	projectID           = os.Getenv("NEBIUS_PROJECT_ID")
+	isValidationTest   = os.Getenv("VALIDATION_TEST")
+	serviceAccountJSON = os.Getenv("NEBIUS_SERVICE_ACCOUNT_JSON")
+	tenantID           = os.Getenv("NEBIUS_TENANT_ID")
 )
 
 func TestNetworkValidation(t *testing.T) {
 	if isValidationTest == "" {
 		t.Skip("VALIDATION_TEST is not set, skipping Nebius Network validation tests")
 	}
 
-	if privateKeyPEMBase64 == "" || publicKeyID == "" || serviceAccountID == "" || projectID == "" {
-		t.Fatalf("NEBIUS_PRIVATE_KEY_PEM_BASE64, NEBIUS_PUBLIC_KEY_ID, NEBIUS_SERVICE_ACCOUNT_ID, and NEBIUS_PROJECT_ID must be set")
+	if serviceAccountJSON == "" || tenantID == "" {
+		t.Fatalf("NEBIUS_SERVICE_ACCOUNT_JSON and NEBIUS_TENANT_ID must be set")
 	}
 
 	config := validation.ProviderConfig{
-		Credential: NewNebiusCredential(fmt.Sprintf("validation-%s", t.Name()), publicKeyID, privateKeyPEMBase64, serviceAccountID, projectID),
+		Credential: NewNebiusCredential(fmt.Sprintf("validation-%s", t.Name()), serviceAccountJSON, tenantID),
 	}
 
 	// Use the test name as the name of the VPC