build: do not pass mode option to test-v8 command

It was removed upstream and is now inferred from the build config.

PR-URL: #35705
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Beth Griggs <bgriggs@redhat.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

PR-URL: #38275
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>

Makefile

@@ -648,8 +648,7 @@ test-with-async-hooks:
 ifneq ("","$(wildcard deps/v8/tools/run-tests.py)")
 # Related CI job: node-test-commit-v8-linux
 test-v8: v8  ## Runs the V8 test suite on deps/v8.
-	deps/v8/tools/run-tests.py --gn --arch=$(V8_ARCH) \
-				--mode=$(BUILDTYPE_LOWER) $(V8_TEST_OPTIONS) \
+	deps/v8/tools/run-tests.py --gn --arch=$(V8_ARCH) $(V8_TEST_OPTIONS) \
 				mjsunit cctest debugger inspector message preparser \
 				$(TAP_V8)
 	$(info Testing hash seed)