VPA: Poll/PollImmediate PollUntilContextTimeout in v1 e2e tests

[omerap12]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Deprecates wait.Poll and wait.PollImmediate in favor of wait.PollUntilContextTimeout.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

NONE

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: omerap12
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[adrianmoisey]

/lgtm