chore: Remove custom reporters from functional tests

[akrejcir]

What this PR does / why we need it:
The custom reporters are no longer used in ginkgo v2.

Which issue(s) this PR fixes:
Fixes #506
Jira: https://issues.redhat.com/browse/CNV-47117

Release note:

None

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[akrejcir]

Let's wait for QE review.

/hold

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[openshift-ci]

@akrejcir: The following tests 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/e2e-functests	7f535ce	link	true	/test e2e-functests
ci/prow/e2e-single-node-functests	7f535ce	link	true	/test e2e-single-node-functests

Full PR test history. Your PR dashboard.

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[kubevirt-bot]

PR needs rebase.

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