Changes

Revert "fix(operator): fix e2e ci job of tidb operator" (#3720)

Reverts PingCAP-QE/ci#3708

Need to temporarily revert the PR. After another PR
https://github.com/ti-community-infra/prow/pull/20 is merged, the pcm
and checkconfig images need to be updated before testing again.
 (commit: 86788cd)