chore: pin golangci-lint (#849)

golangci requires go 1.20 now 😬 . 

We can upgrade to 1.20, but for now the change in this tool is causing
lint failures since we use `@latest` when we install it.

Signed-off-by: Todd Baert <todd.baert@dynatrace.com>

.pre-commit-config.yaml

@@ -5,6 +5,6 @@ repos:
  - id: gofumpt
 
  - repo: https://github.com/golangci/golangci-lint
- rev: v1.46.2
+ rev: v1.50.1
  hooks:
  - id: golangci-lint

Makefile

@@ -60,7 +60,8 @@ uninstall:
  rm /etc/systemd/system/flagd.service
  rm -f $(DESTDIR)$(PREFIX)/bin/flagd
 lint:
- go install -v github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+# pinned to @v1.53.3 until we migrate to go 1.20 (newer versions use incompatible transitive deps)
+ go install -v github.com/golangci/golangci-lint/cmd/golangci-lint@v1.53.3
  $(foreach module, $(ALL_GO_MOD_DIRS), ${GOPATH}/bin/golangci-lint run --deadline=5m --timeout=5m $(module)/... || exit;)
 install-mockgen:
  go install github.com/golang/mock/mockgen@v1.6.0