Disable go license generation as part of make tidy (go-gitea#33747)

It seems something broken `google/go-licenses` (maybe related to go
1.24), and my findings are in
google/go-licenses#128 (comment).
I think it's best we disable this generation for now until a better
solution is found.

Also, enable showing stderr output so we can actually debug this thing.
For reference, these are the errors that currently apparently break the
tool:

```
E0228 05:15:27.005759   13158 library.go:117] Package text/tabwriter does not have module info. Non go modules projects are no longer supported. For feedback, refer to google/go-licenses#128.
E0228 05:15:27.005776   13158 library.go:117] Package net/http/fcgi does not have module info. Non go modules projects are no longer supported. For feedback, refer to google/go-licenses#128.
F0228 05:15:27.028122   13158 main.go:77] some errors occurred when loading direct and transitive dependency packages
```

Author: silverwind

Makefile

@@ -508,7 +508,8 @@ unit-test-coverage:
 tidy:
 	$(eval MIN_GO_VERSION := $(shell grep -Eo '^go\s+[0-9]+\.[0-9.]+' go.mod | cut -d' ' -f2))
 	$(GO) mod tidy -compat=$(MIN_GO_VERSION)
-	@$(MAKE) --no-print-directory $(GO_LICENSE_FILE)
+# disabled because of issues related to https://github.com/google/go-licenses/issues/128
+# 	@$(MAKE) --no-print-directory $(GO_LICENSE_FILE)
 
 vendor: go.mod go.sum
 	$(GO) mod vendor
@@ -527,7 +528,7 @@ tidy-check: tidy
 go-licenses: $(GO_LICENSE_FILE)
 
 $(GO_LICENSE_FILE): go.mod go.sum
-	-$(GO) run $(GO_LICENSES_PACKAGE) save . --force --save_path=$(GO_LICENSE_TMP_DIR) 2>/dev/null
+	-$(GO) run $(GO_LICENSES_PACKAGE) save . --force --save_path=$(GO_LICENSE_TMP_DIR)
 	$(GO) run build/generate-go-licenses.go $(GO_LICENSE_TMP_DIR) $(GO_LICENSE_FILE)
 	@rm -rf $(GO_LICENSE_TMP_DIR)