go/lint: allow setting more golangci-lint flags

We will often want to tweak these CLI flags, so there needs to be
support for doing so.

Related: golangci/golangci-lint#2239

Author: adamdecaf

Diff for: go/lint-project.sh

@@ -175,7 +175,7 @@ if [[ "$OS_NAME" != "windows" ]]; then
     fi
 
     ./bin/golangci-lint --version
-    ./bin/golangci-lint run "$enabled" --verbose --skip-dirs="(admin|client)" --timeout=5m --disable=errcheck
+    ./bin/golangci-lint run "$enabled" "$GOLANGCI_FLAGS" --verbose --skip-dirs="(admin|client)" --timeout=5m --disable=errcheck
 
     echo "finished golangci-lint check"
 fi

Diff for: makefile

@@ -2,7 +2,7 @@ PLATFORM=$(shell uname -s | tr '[:upper:]' '[:lower:]')
 
 .PHONY: check
 check:
-	EXPERIMENTAL=gitleaks GOCYCLO_LIMIT=15 ./go/lint-project.sh
+	EXPERIMENTAL=gitleaks GOCYCLO_LIMIT=15 GOLANGCI_FLAGS="--exclude-use-default=false" ./go/lint-project.sh
 
 .PHONY: clean
 clean: