Fix gpu cluster downgrade test config. Looks like for downgrade tests, the downgrade version needs to be extracted first. After the fix, the gpu cluster downgrade tests will pass but without running any matching test until the GPUClusterDowngrade cherry-pick PR is merged into the downgrade k8s version branch.
Fix gpu cluster downgrade test config.
Looks like for downgrade tests, the downgrade version needs to be
extracted first. After the fix, the gpu cluster downgrade tests
will pass but without running any matching test until the
GPUClusterDowngrade cherry-pick PR is merged into the downgrade
k8s version branch.

kubernetes/test-infra,abgworrall/test-infra,BenTheElder/test-infra,shyamjvs/test-infra,lavalamp/test-infra,jessfraz/test-infra,kubernetes/test-infra,fejta/test-infra,kubernetes/test-infra,lavalamp/test-infra,kargakis/test-infra,BenTheElder/test-infra,pwittrock/test-infra,cblecker/test-infra,monopole/test-infra,brahmaroutu/test-infra,BenTheElder/test-infra,jessfraz/test-infra,dims/test-infra,pwittrock/test-infra,lavalamp/test-infra,shyamjvs/test-infra,jlowdermilk/test-infra,cjwagner/test-infra,jessfraz/test-infra,mindprince/test-infra,fejta/test-infra,abgworrall/test-infra,mindprince/test-infra,abgworrall/test-infra,krzyzacy/test-infra,dims/test-infra,krzyzacy/test-infra,BenTheElder/test-infra,jessfraz/test-infra,mindprince/test-infra,dims/test-infra,monopole/test-infra,michelle192837/test-infra,mindprince/test-infra,krzyzacy/test-infra,cblecker/test-infra,michelle192837/test-infra,monopole/test-infra,cjwagner/test-infra,krzyzacy/test-infra,pwittrock/test-infra,ixdy/kubernetes-test-infra,fejta/test-infra,jlowdermilk/test-infra,michelle192837/test-infra,lavalamp/test-infra,BenTheElder/test-infra,jlowdermilk/test-infra,kubernetes/test-infra,cjwagner/test-infra,monopole/test-infra,jlowdermilk/test-infra,dims/test-infra,shyamjvs/test-infra,ixdy/kubernetes-test-infra,dims/test-infra,kubernetes/test-infra,cjwagner/test-infra,mindprince/test-infra,michelle192837/test-infra,krzyzacy/test-infra,ixdy/kubernetes-test-infra,jessfraz/test-infra,kargakis/test-infra,cjwagner/test-infra,michelle192837/test-infra,shyamjvs/test-infra,cblecker/test-infra,brahmaroutu/test-infra,kargakis/test-infra,monopole/test-infra,brahmaroutu/test-infra,monopole/test-infra,cblecker/test-infra,jlowdermilk/test-infra,fejta/test-infra,kubernetes/test-infra,abgworrall/test-infra,dims/test-infra,lavalamp/test-infra,ixdy/kubernetes-test-infra,kargakis/test-infra,shyamjvs/test-infra,lavalamp/test-infra,kargakis/test-infra,michelle192837/test-infra,brahmaroutu/test-infra,cblecker/test-infra,jessfraz/test-infra,jlowdermilk/test-infra,krzyzacy/test-infra,pwittrock/test-infra,abgworrall/test-infra,BenTheElder/test-infra,fejta/test-infra,brahmaroutu/test-infra,kargakis/test-infra,cblecker/test-infra,shyamjvs/test-infra,brahmaroutu/test-infra,ixdy/kubernetes-test-infra,pwittrock/test-infra,cjwagner/test-infra,fejta/test-infra