[release-0.7] Add test_k8s_e2e_capz.sh

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #1077

/assign nilo19

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[k8s-ci-robot]

@k8s-infra-cherrypick-robot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cloud-provider-azure-e2e-ccm-vmss-1-20	ebc0f92	link	true	/test pull-cloud-provider-azure-e2e-ccm-vmss-1-20
pull-cloud-provider-azure-e2e-ccm-vmss-basic-lb-1-20	ebc0f92	link	true	/test pull-cloud-provider-azure-e2e-ccm-vmss-basic-lb-1-20

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