MM-49703: Bump Go version to 1.19 (#22107)

https://mattermost.atlassian.net/browse/MM-49703

Co-authored-by: Mattermost Build <build@mattermost.com>

Makefile

@@ -312,7 +312,7 @@ endif
 
 golangci-lint: ## Run golangci-lint on codebase
 	@# Keep the version in sync with the command in .circleci/config.yml
-	$(GO) install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.46.2
+	$(GO) install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.50.1
 
 	@echo Running golangci-lint
 	$(GOBIN)/golangci-lint run ./...