pacoxu: kubelet: make the image pull time more accurate in event

JobBuild
41902853
11-06 05:43
d77adaf3
11-03 02:57
111772
11-02 05:42
e59ee655
11-02 05:41
pull-kubernetes-conformance-kind-ga-only-parallel 1589720912029028352 1589131387598802944 1588002034324344832 1587681189752213504
pull-kubernetes-dependencies 1589720911815118848 1589131387410059264 1588002034102046720 1587681189538304000
pull-kubernetes-e2e-gce-100-performance 1589728904434683904 1589131387707854848 1588002034471145472 1587681189873848320
pull-kubernetes-e2e-gce-ubuntu-containerd 1589720911861256192 1589131387447808000 1588002034143989760 1587703091745001472 1587681189576052736
pull-kubernetes-e2e-kind 1589720911936753664 1589131387519111168 1588002034240458752 1587703091786944512 1587692816123826176 1587681189651550208
pull-kubernetes-e2e-kind-ipv6 1589720911991279616 1589131387556859904 1588002034282401792 1587681189697687552
pull-kubernetes-integration 1589720911915782144 1589131387481362432 1588002034194321408 1587681189613801472
pull-kubernetes-node-e2e-containerd 1589720912108720128 1589131387665911808 1588002034412425216 1587681189819322368
pull-kubernetes-typecheck 1589720912188411904 1589131387745603584 1588002034500505600 1587681189907402752
pull-kubernetes-unit 1589720912091942912 1589131387636551680 1588002034370482176 1587681189789962240
pull-kubernetes-verify 1589720913480257536 1589131389083586560 1588002035796545536 1587681191199248384
pull-kubernetes-verify-govet-levee 1589720912641396736 1589131388244725760 1588002034945101824 1587681190360387584