Add check for LB availability to e2e

[oliviassss]

Issue

Description

Add a step to wait for the NLB to be available before proceeding to any resource deletions, to some test suites that were lacking this check. For the below reasons:

• There's a limit from ELB side that if we delete the SG before NLB configuration finishes, it will cause an issue and may put the internal metrics on fire, and ELB is working on adding an error message to this.
• We should check the LB status no matter whether we are doing traffic test or just validating the configurations.

Test:

• Ran the e2e test in my dev cluster and verified all test suites passed.

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[oliviassss]

/retest

[oliviassss]

/retest

[johngmyers]

The suite is timing out. Perhaps the timeout in scripts/run-e2e-test.sh needs to be increased?

[oliviassss]

@johngmyers, thank you! I was just aware that ginkgo v2 change the default timeout from 24h to 1h. I have updated the timeout to 2h, let's see how it works this time.

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (aa893b5) 55.61% compared to head (8c91aab) 55.61%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3343   +/-   ##
=======================================
  Coverage   55.61%   55.61%           
=======================================
  Files         149      149           
  Lines        8819     8819           
=======================================
  Hits         4905     4905           
  Misses       3577     3577           
  Partials      337      337           

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[M00nF1sh]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: M00nF1sh, oliviassss

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