XML CDATA section being ignored by test-results-action

[Molter73]

Describe the bug
I'm generating junit test reports using the go-junit-report tool which prints the stacktrace as a CDATA section in the XML output, looking something like this:

                <testcase name="TestProcessNetwork/TestProcessViz" classname="" time="0.000">
                        <failure message="Failed"><![CDATA[    process_network.go:119:
                Error Trace:    /tests/suites/process_network.go:119
                Error:          Test failure
                Test:           TestProcessNetwork/TestProcessViz
2025/02/17 13:04:51 INFO: logs container-stats (443 bytes stdout, 0 bytes stderr)
2025/02/17 13:04:51 WARN: missing name for stat line 0 of 1
2025/02/17 13:04:51 INFO: TestProcessNetwork: Gathering logs for "container-stats"
2025/02/17 13:04:51 INFO: logs container-stats (443 bytes stdout, 0 bytes stderr)
2025/02/17 13:04:51 INFO: Writing container-logs/cos_cos-beta/core_bpf/perf.json
2025/02/17 13:04:52 INFO: TestProcessNetwork: Gathering logs for "nginx"
2025/02/17 13:04:52 INFO: logs nginx (91 bytes stdout, 0 bytes stderr)
2025/02/17 13:04:52 INFO: TestProcessNetwork: Gathering logs for "nginx-curl"
2025/02/17 13:04:52 INFO: logs nginx-curl (0 bytes stdout, 0 bytes stderr)
2025/02/17 13:04:55 INFO: TestProcessNetwork: Gathering logs for "collector"
2025/02/17 13:04:55 INFO: logs collector (0 bytes stdout, 30497 bytes stderr)]]></failure>
                </testcase>

The generated PR comment does show the test has failed with the Failed message, but the stacktrace seems to be missing
stackrox/collector#2044 (comment)

Environment (please complete the following information):

• Fully running on GitHub Actions.

To Reproduce
Steps to reproduce the behavior:

1. Run some go tests and process them with go-junit-report as suggested in its README: go test -v 2>&1 ./... | go-junit-report -set-exit-code > junit.xml
2. Upload the report with the codecov/test-results-action GHA action.

Expected behavior
The generated PR comment should have the stacktrace as part of its body.