Provide updates to fix e2e tests

[dkwon17]

What does this PR do?

• remove unused chectl flag
• increase podreadytimeout
• add jq in the e2e tests image

What issues does this PR fix or reference?

Is it tested? How?

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dkwon17

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[openshift-ci]

@dkwon17: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v14-che-happy-path	bd35c55	link	true	/test v14-che-happy-path

Full PR test history. Your PR dashboard.

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