chore: better error message when metric publish failed #1777

	# Copyright 2023 Google LLC
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	# Github action job to test core java library features on
	# downstream client libraries before they are released.
	on:
	push:
	branches:
	- main
	pull_request:
	name: conformance
	jobs:
	conformance:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/checkout@v4
	with:
	repository: googleapis/cloud-bigtable-clients-test
	ref: main
	path: cloud-bigtable-clients-test
	- uses: actions/setup-java@v4
	with:
	distribution: zulu
	java-version: 8
	- uses: actions/setup-go@v5
	with:
	go-version: '>=1.20.2'
	- run: java -version
	- run: go version
	- run: .kokoro/conformance.sh

Provide feedback