[Feature Request] Introduce testcase-specific reporting

Currently, our report assigns to every testcase a result (PASS/FAIL/ABORT). Everything else is buried in blanket stdout/stderr capture, which has its own internal structure, but that is only apparent if you see all the intervening debug messages, which are redacted on the compliance monitor. It's not great UX.

Also stderr should not be relevant to anyone except test developers! That need not even be part of the UI (except for the full report view).

• specify comprehensive json/yaml format for testcase-specific reporting
• change all scripts so that report is printed on stdout
• make sure stderr only contains debug info and unexpected operational errors
• hide stderr from CM UI (except in full report view)
• make testcase-specific report available in CM UI (no longer calling it stdout)