osbuild2: support for the new vpc options in the qemu stage

Recently osbuild exposed the low level qemu options for the VPC
format. Add support for the `force_size` option.

internal/osbuild2/qemu_stage.go

@@ -85,6 +85,9 @@ func (o VDIOptions) formatType() QEMUFormat {
 type VPCOptions struct {
 	// The type of the format must be 'vpc'
 	Type QEMUFormat `json:"type"`
+
+	// VPC related options
+	ForceSize *bool `json:"force_size,omitempty"`
 }
 
 func (VPCOptions) isQEMUFormatOptions() {}

internal/osbuild2/qemu_stage_test.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/osbuild/osbuild-composer/internal/common"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -133,6 +134,20 @@ func TestNewQEMUStageOptions(t *testing.T) {
 				},
 			},
 		},
+		{
+			Filename: "image.vpc",
+			Format:   QEMUFormatVPC,
+			FormatOptions: VPCOptions{
+				ForceSize: common.BoolToPtr(false),
+			},
+			ExpectedOptions: &QEMUStageOptions{
+				Filename: "image.vpc",
+				Format: VPCOptions{
+					Type:      QEMUFormatVPC,
+					ForceSize: common.BoolToPtr(false),
+				},
+			},
+		},
 		{
 			Filename:      "image.vmdk",
 			Format:        QEMUFormatVMDK,