fix: flux kyverno tests & return stderr while reading kubeconfig via kwokctl

[prit342]

What type of PR is this?

/kind feature

What this PR does / why we need it:

• This PR ensures that the error message from kwokctl get kubeconfig is captured and returned as part of the wrapped error
• Also fixes the flaky flux kyverno tests by ensuring that the kyverno related deployments are available before the tests are launched

Which issue(s) this PR fixes:

Fixes #440

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

None

Additional documentation e.g., Usage docs, etc.:

None

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: prit342 / name: Prithak S. (4d554ee)

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[k8s-ci-robot]

Hi @prit342. Thanks for your PR.

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[cpanato]

/ok-to-test

[prit342]

The tests directly affected by this PR sigs.k8s.io/e2e-framework/examples/kwok/kwok_with_config are passing successfully. However, sigs.k8s.io/e2e-framework/examples/third_party_integration/flux/kyverno tests in the suite are currently failing which this PR does not affect.

[prit342]

/retest

[harshanarayana]

xref: #440

Created a tracker for the kyverno failures. That test has been flaking to much lately. cc @vladimirvivien @cpanato

I will take a look at this over the weekend to get it fixed.

[prit342]

Thank you @harshanarayana for the pointers related to the flaky tests. I've added logic to check for the availability of all Kyverno related deployments before running tests. And after this change, the tests have not failed in subsequent runs. As indicated previously the tests related to sigs.k8s.io/e2e-framework/examples/kwok/kwok_with_config are passing successfully.

CC @vladimirvivien @cpanato

[cpanato]

/lgtm

[harshanarayana]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: harshanarayana, prit342

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