andyzhangx: Automated cherry pick of #92330: fix: don't use docker config cache if it's empty

JobBuild
93314
07-22 02:21
481fd4b6
07-22 02:20
pull-kubernetes-bazel-build 1289739727091535873 1289388413417426945 1285761490493640706
pull-kubernetes-bazel-test 1289739727078952960 1289388413413232641 1285761490481057796
pull-kubernetes-dependencies 1289739727074758657 1289388413417426946 1285761490443309056
pull-kubernetes-e2e-aks-engine-azure 1285761490497835008
pull-kubernetes-e2e-azure-disk 1285761490497835010
pull-kubernetes-e2e-azure-disk-vmss 1285761490493640707
pull-kubernetes-e2e-azure-disk-windows 1285761490481057793
pull-kubernetes-e2e-azure-file 1285761490497835009
pull-kubernetes-e2e-azure-file-windows 1285761490481057795
pull-kubernetes-e2e-gce 1289739727074758658 1289388413404844032 1285761490481057794
pull-kubernetes-e2e-gce-100-performance 1289739727083147264 1289388413413232640 1285761490468474880
pull-kubernetes-e2e-gce-device-plugin-gpu 1285785522853122048 1285761490455891968
pull-kubernetes-integration 1289739727083147265 1289517010387996672 1289388413417426944 1285761490493640705
pull-kubernetes-kubemark-e2e-gce-big 1289802390916042752 1289739727091535872 1289388413400649728 1285761490476863488
pull-kubernetes-node-e2e 1289739727074758656 1289388413425815552 1285761490493640704
pull-kubernetes-typecheck 1289739727083147266 1289388413413232642 1285761490447503360
pull-kubernetes-verify 1289739727074758659 1289717833227309056 1289622706001547264 1289517010387996673 1289388413413232643 1285761490481057792