Bump  kubekins-e2e 1.16 variants to golang 1.16.6
Bump  kubekins-e2e 1.16 variants to golang 1.16.6

This commit update the kubekins-e2e variants to 1.16.6. Only
the 1.16 variants are modified pending cherry picks of 1.15.14

Signed-off-by: Adolfo García Veytia (Puerco) <9de42c8261a7cacaae239656a4dd6991d9b9250f@uservers.net>

michelle192837/test-infra,fejta/test-infra,BenTheElder/test-infra,cjwagner/test-infra,monopole/test-infra,monopole/test-infra,dims/test-infra,michelle192837/test-infra,michelle192837/test-infra,BenTheElder/test-infra,kubernetes/test-infra,kubernetes/test-infra,monopole/test-infra,cjwagner/test-infra,BenTheElder/test-infra,fejta/test-infra,jessfraz/test-infra,cblecker/test-infra,kubernetes/test-infra,dims/test-infra,monopole/test-infra,jessfraz/test-infra,BenTheElder/test-infra,fejta/test-infra,michelle192837/test-infra,michelle192837/test-infra,cjwagner/test-infra,kubernetes/test-infra,jessfraz/test-infra,cblecker/test-infra,cjwagner/test-infra,BenTheElder/test-infra,kubernetes/test-infra,dims/test-infra,monopole/test-infra,cjwagner/test-infra,cjwagner/test-infra,dims/test-infra,fejta/test-infra,BenTheElder/test-infra,cblecker/test-infra,jessfraz/test-infra,dims/test-infra,michelle192837/test-infra,cblecker/test-infra,fejta/test-infra,kubernetes/test-infra,jessfraz/test-infra,dims/test-infra,jessfraz/test-infra,cblecker/test-infra,fejta/test-infra,cblecker/test-infra,monopole/test-infra