Reduces ~140 indirect imports for plugin/framework importers (#8208)

* Avoid plugin framework importers from needing cloud provider imports

Signed-off-by: Tiger Kaovilai <tkaovila@redhat.com>

pkg/plugin/framework/import_test.go

@@ -0,0 +1,53 @@
+package framework
+
+import (
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// test that this package do not import cloud provider
+
+// Prevent https://github.com/vmware-tanzu/velero/issues/8207 and https://github.com/vmware-tanzu/velero/issues/8157
+func TestPkgImportNoCloudProvider(t *testing.T) {
+	_, filename, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatalf("No caller information")
+	}
+	t.Logf("Current test file path: %s", filename)
+	t.Logf("Current test directory: %s", filepath.Dir(filename)) // should be this package name
+	// go list -f {{.Deps}} ./<path-to-this-package-dir>
+	cmd := exec.Command(
+		"go",
+		"list",
+		"-f",
+		"{{.Deps}}",
+		".",
+	)
+	// set cmd.Dir to this package even if executed from different dir
+	cmd.Dir = filepath.Dir(filename)
+	output, err := cmd.Output()
+	require.NoError(t, err)
+	// split dep by line, replace space with newline
+	deps := strings.ReplaceAll(string(output), " ", "\n")
+	require.NotEmpty(t, deps)
+	// ignore k8s.io
+	k8sio, err := regexp.Compile("^k8s.io")
+	require.NoError(t, err)
+	cloudProvider, err := regexp.Compile("aws|cloud.google.com|azure")
+	require.NoError(t, err)
+	cloudProviderDeps := []string{}
+	for _, dep := range strings.Split(deps, "\n") {
+		if !k8sio.MatchString(dep) {
+			if cloudProvider.MatchString(dep) {
+				cloudProviderDeps = append(cloudProviderDeps, dep)
+			}
+		}
+	}
+	require.Empty(t, cloudProviderDeps)
+}