refactor: optimize backup return message while cancelled #413

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	name: Unit Test

	on:
	pull_request:
	branches: [ main ]
	paths:
	- 'shardingsphere-operator/**'
	- 'pitr/**'
	- '.github/workflows/unit-test.yml'
	jobs:
	operator:
	runs-on: ubuntu-latest
	steps:
	- name: "checkout codes"
	uses: actions/checkout@v3
	- name: "setup go"
	uses: actions/setup-go@v4
	with:
	go-version: '^1.18.1'
	- name: "shardingsphere operator test"
	run: \|
	cd shardingsphere-operator
	make test
	- name: "pitr agent test"
	run: \|
	cd pitr/agent
	make test
	- name: "pitr cli test"
	run: \|
	cd pitr/cli
	make test
	- name: "aggregate reports"
	run: \|
	cat ./shardingsphere-operator/cover.out >> cover.out
	cat ./pitr/cli/cover.out >> cover.out
	cat ./pitr/agent/cover.out >> cover.out
	- name: "code coverage"
	uses: codecov/codecov-action@v3
	with:
	files: ./cover.out

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