refactor(k8s): add v prefix for Go packages

[DmitriyLewen]

Description

Gobinary packages have v prefix.
We removed v prefix truncation for gomod packages (see #7733).

But Go packages obtained from k8s scanner don't have v prefix:

trivy/pkg/k8s/scanner/scanner_test.go

Lines 87 to 112 in 983ac15

	{
	Type: core.TypeApplication,
	Name: "github.com/containerd/containerd",
	Version: "1.5.2",
	Properties: []core.Property{
	{
	Name: k8sComponentName,
	Value: "github.com/containerd/containerd",
	Namespace: k8sCoreComponentNamespace,
	},
	{
	Name: k8sComponentType,
	Value: "node",
	Namespace: k8sCoreComponentNamespace,
	},
	},
	PkgIdentifier: ftypes.PkgIdentifier{
	PURL: &packageurl.PackageURL{
	Type: "golang",
	Name: "github.com/containerd/containerd",
	Version: "1.5.2",
	Qualifiers: packageurl.Qualifiers{},
	},
	BOMRef: "pkg:golang/github.com%2Fcontainerd%[email protected]",
	},
	},

We need to add it.