chore: remove step for authenticated master session check to use standard script

[amandavialva01]

chore: remove step for authenticated master session check to use standard script

Ticket

No ticket.

Description

test-e2e-gke-shared-cluster adds a step that waits for the master connection using an authenticated determined session, verifying that valid authenticated requests during the test runs are expected to succeed.
Remove this step to use the standard script that tests the master connection with an unauth session, as this achieves the main goal of the step, which is to ensure that the master is accessible prior to running test cases.

Test Plan

CI passes.

Checklist

• Changes have been manually QA'd
• User-facing API changes need the "User-facing API Change" label.
• Release notes should be added as a separate file under docs/release-notes/.
  See Release Note for details.
• Licenses should be included for new code which was copied and/or modified from any external code.

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[JComins000]

one comment. also, why doesn't this issue have a ticket?

[amandavialva01]

one comment. also, why doesn't this issue have a ticket?

This was inquired about in a Slack thread. Since it's a quick change, I just made a PR!