runtime: Add make handle_vendor

This will help us to ensure that we always update the vendored code when
needed.   Right now we've been lacking behind and we tend to realise
something change during the next mandatory update, which is not exactly
optimal.

Related: kata-containers#2159

Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>

src/runtime/Makefile

@@ -582,7 +582,8 @@ $(MONITOR_OUTPUT): $(SOURCES) $(GENERATED_FILES) $(MAKEFILE_LIST) .git-commit
 	install \
 	show-header \
 	show-summary \
-	show-variables
+	show-variables \
+	vendor
 
 $(TARGET).coverage: $(SOURCES) $(GENERATED_FILES) $(MAKEFILE_LIST)
 	$(QUIET_TEST)go test -o $@ -covermode count
@@ -647,6 +648,11 @@ install-scripts: $(SCRIPTS)
 install-completions:
 	$(QUIET_INST)install --mode 0644 -D  $(BASH_COMPLETIONS) $(DESTDIR)/$(BASH_COMPLETIONSDIR)/$(notdir $(BASH_COMPLETIONS));
 
+handle_vendor:
+	go mod tidy
+	go mod vendor
+	go mod verify
+
 clean:
 	$(QUIET_CLEAN)rm -f \
 		$(CONFIGS) \