* add github action about e2e cache
Signed-off-by: YangKeao <yangkeao@chunibyo.icu>

* use absolute address in github cache action
Signed-off-by: YangKeao <yangkeao@chunibyo.icu>

* use github.workspace instead
Signed-off-by: YangKeao <yangkeao@chunibyo.icu>

* setup another docker builder
Signed-off-by: YangKeao <yangkeao@chunibyo.icu>

* upload cache
Signed-off-by: YangKeao <yangkeao@chunibyo.icu>

* try parallel build
Signed-off-by: YangKeao <yangkeao@chunibyo.icu>

* use minikube image load directly
Signed-off-by: YangKeao <yangkeao@chunibyo.icu>
Co-authored-by: Ti Chi Robot <ti-community-prow-bot@tidb.io>