The Sonobuoy Aggregator API is reporting errors[1] to process the body when the plugins sends a payload with a large amount of errors.

 [1] errors reporting on the aggregator (sonobuoy pod):

time="2023-01-11T18:57:04Z" level=info msg="received request" client_cert="[20-openshift-conformance-validated]" method=POST plugin_name=20-openshift-conformance-validated url=/api/v1/progress/global/20-openshift-conformance-validated
time="2023-01-11T18:57:04Z" level=error msg="Failed to get progress update from request: unable to decode body: invalid character '[' after array element" 

When looking to the 'report-progress' container, on plugin, the payload looks like:

<truncated payload>

It was caused when in the 'upgrade' feature implementation, when the conformance plugin was running with an old version of openshift-tests.

Steps to reproduce:

• Run OPCT
• make sure the openshift-tests and oc utilities are outdated before running (it must change the plugin removing this patch and this.
• Check the logs of pod plugin, container 'report-progress'. The number of messages on the payload sent by aggregator should be large.

Suggestion to fix on OPCT:

• prevent the bug (fixes on OPCT-7 )
• prevent to send large payloads: patch to truncate failures items to an ID, instead of e2e name (it will not affect the final results)

Long-term solution: this is a bug on the Sonobuoy Aggregator. It should be handled on the API refusing large payloads, returning some HTTP code.