[MM-17889] Implement validation of plugin API version comments (#11941)

Makefile

@@ -144,6 +144,7 @@ govet: ## Runs govet against all packages.
 	$(GO) get golang.org/x/tools/go/analysis/passes/shadow/cmd/shadow
 	$(GO) vet $(GOFLAGS) $(ALL_PACKAGES) || exit 1
 	$(GO) vet -vettool=$(GOPATH)/bin/shadow $(GOFLAGS) $(ALL_PACKAGES) || exit 1
+	$(GO) run plugin/checker/main.go
 
 gofmt: ## Runs gofmt against all packages.
 	@echo Running GOFMT