e2e: remove dependencies on k8s-kind node

[cofyc]

Feature Request

Is your feature request related to a problem? Please describe:

Current CI relies on k8s-kind node which is not scalable and will fail if k8s-kind is not available.

tidb-operator/ci/pingcap_tidb_operator_build_kind.groovy

Lines 205 to 226 in 2dd0f54

	node('k8s-kind') {
	dir("${PROJECT_DIR}"){
	deleteDir()
	unstash 'tidb-operator'
	if ( !(BUILD_BRANCH ==~ /[a-z0-9]{40}/) ) {
	stage('upload tidb-operator binary and charts'){
	//upload binary and charts
	sh """
	cp ~/bin/config.cfg ./
	tar -zcvf tidb-operator.tar.gz images/tidb-operator charts
	filemgr-linux64 --action mput --bucket pingcap-dev --nobar --key builds/pingcap/operator/${GITHASH}/centos7/tidb-operator.tar.gz --file tidb-operator.tar.gz
	"""
	//update refs
	writeFile file: 'sha1', text: "${GITHASH}"
	sh """
	filemgr-linux64 --action mput --bucket pingcap-dev --nobar --key refs/pingcap/operator/${BUILD_BRANCH}/centos7/sha1 --file sha1
	rm -f sha1 tidb-operator.tar.gz config.cfg
	"""
	}
	}
	}
	}

Describe the feature you'd like:

Remove dependencies on k8s-kind node.

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