refactor(cve): improve CVE test time by mocking trivy (#1184)

- refactor(cve): remove the global of type cveinfo.CveInfo from the extensions package
  Replace it with an attribute on controller level
- refactor(controller): extract initialization logic from controller.Run()
- test(cve): mock cve scanner in cli tests

Signed-off-by: Andrei Aaron <aaaron@luxoft.com>

pkg/exporter/api/controller_test.go

@@ -126,14 +126,18 @@ func TestNewExporter(t *testing.T) {
 
 				dir := t.TempDir()
 				serverController.Config.Storage.RootDirectory = dir
-				go func(c *zotapi.Controller) {
+				go func(ctrl *zotapi.Controller) {
+					if err := ctrl.Init(context.Background()); err != nil {
+						panic(err)
+					}
+
 					// this blocks
-					if err := c.Run(context.Background()); !errors.Is(err, http.ErrServerClosed) {
+					if err := ctrl.Run(context.Background()); !errors.Is(err, http.ErrServerClosed) {
 						panic(err)
 					}
 				}(serverController)
-				defer func(c *zotapi.Controller) {
-					_ = c.Server.Shutdown(context.TODO())
+				defer func(ctrl *zotapi.Controller) {
+					_ = ctrl.Server.Shutdown(context.TODO())
 				}(serverController)
 				// wait till ready
 				for {