[TESTS] add GOLANGCI_LINT_ARGS to control golangci calls

It is for instance useful with:

GOLANGCI_LINT_ARGS="--concurrency $(expr $(nproc) / 2)" make lint-backend

on a laptop where overcommitting the CPU degrades the UI performances.

(cherry picked from commit 76023319c4275645b9c8c3bd896c1e60e1d57ae7)
(cherry picked from commit 55eb05b03db15355745af83e612406baccc2b126)

Makefile

@@ -380,11 +380,11 @@ lint-md: node_modules
 
 .PHONY: lint-go
 lint-go:
-	$(GO) run $(GOLANGCI_LINT_PACKAGE) run
+	$(GO) run $(GOLANGCI_LINT_PACKAGE) run $(GOLANGCI_LINT_ARGS)
 
 .PHONY: lint-go-fix
 lint-go-fix:
-	$(GO) run $(GOLANGCI_LINT_PACKAGE) run --fix
+	$(GO) run $(GOLANGCI_LINT_PACKAGE) run $(GOLANGCI_LINT_ARGS) --fix
 
 # workaround step for the lint-go-windows CI task because 'go run' can not
 # have distinct GOOS/GOARCH for its build and run steps