Rename E2E environment variables for consistency across projects

[CecileRobertMichon]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it: Following up on kubernetes-sigs/azurefile-csi-driver#459.

cloud-provider-azure e2e uses different environment variable names than everything else (https://github.com/kubernetes-sigs/cloud-provider-azure/blob/83ec139e2224561e12e896c483b31cb08ad351a2/site/content/en/development/e2e/e2e-tests-azure.md). Updating kubetest to set the same environment variables for consistency. The new names are also slightly better syntactically IMO.

/hold until kubernetes/test-infra#21917 is merged

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Release note:

Rename E2E environment variables for consistency across projects

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: CecileRobertMichon
To complete the pull request process, please assign andyzhangx after the PR has been reviewed.
You can assign the PR to them by writing /assign @andyzhangx in a comment when ready.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[CecileRobertMichon]

(for testing)

/test pull-cloud-provider-azure-e2e-ccm-capz

[feiskyer]

/retest

[nilo19]

The kubeconfig is missing

[feiskyer]

while most test failures reported "No credentials provided for AAD application" (test failure is expected), the logs of capz job is very confusing as there's no error reported there. @CecileRobertMichon could you help to fix error logs of capz job?

[CecileRobertMichon]

@feiskyer I'm still working on the capz job, you can ignore it for now.

The other ones should be fixed once the jobs get the latest kubetest image.

[CecileRobertMichon]

/retest

[CecileRobertMichon]

/retest

[CecileRobertMichon]

/hold until kubernetes/test-infra#21920 merges

[CecileRobertMichon]

/retest

[k8s-ci-robot]

@CecileRobertMichon: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-cloud-provider-azure-e2e-ccm-capz	aa5ce6b	link	/test pull-cloud-provider-azure-e2e-ccm-capz

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[CecileRobertMichon]

/hold cancel

@feiskyer this is ready. I'm working on fixing the capz test in #607.

[feiskyer]

/lgtm