Install zeitwerk at test-bundled-gems-prepare

Author: hsbt

common.mk

@@ -1601,7 +1601,7 @@ no-install-for-test-bundled-gems: no-update-default-gemspecs
 yes-install-for-test-bundled-gems: yes-update-default-gemspecs
 	$(XRUBY) -C "$(srcdir)" -r./tool/lib/gem_env.rb bin/gem \
 		install --no-document --conservative \
-		"hoe" "json-schema" "test-unit-rr" "simplecov" "simplecov-html" "simplecov-json" "rspec"
+		"hoe" "json-schema" "test-unit-rr" "simplecov" "simplecov-html" "simplecov-json" "rspec" "zeitwerk"
 
 test-bundled-gems-fetch: yes-test-bundled-gems-fetch
 yes-test-bundled-gems-fetch:
@@ -1661,8 +1661,6 @@ test-bundler-prepare: $(TEST_RUNNABLE)-test-bundler-prepare
 no-test-bundler-prepare: no-test-bundler-precheck
 yes-test-bundler-prepare: yes-test-bundler-precheck
 	$(ACTIONS_GROUP)
-	$(XRUBY) -C "$(srcdir)" bin/gem install --no-document \
-		--install-dir .bundle --conservative "zeitwerk"
 	$(XRUBY) -C $(srcdir) -Ilib \
 		-e 'ENV["GEM_HOME"] = File.expand_path(".bundle")' \
 		-e 'ENV["BUNDLE_APP_CONFIG"] = File.expand_path(".bundle")' \