Do not fail with error if provided test report json file is missing

[lafriks]

When running in CI this is useful not to fail in case test report generation somehow failed or was not run and because of that report json file is missing.

This could probably be also as an cli arg like -skip-missing-file and than it would just exit with status code 0 if report file is not present

[mfridman]

By report file, do you mean the output tparse produces? I presume you're referring to all the internal errors that tparse might run into, and you'd like to avoid those failing CI?

[lafriks]

I would like to skip failing CI on all errors (just exit status code)