Optionally ignore TestRail HTTP errors

[treyturner]

Today our pipeline broke because of a TestRail outage: https://testrail.statuspage.io/incidents/0rwfbww0yz70

creating new TestRail run for project 1
Could not create a new TestRail run
Response: HTTPError
Please check your TestRail configuration

Exited with code exit status 1

It would be nice if there were flags that could be supplied to the reporter to gracefully handle this situation. Each would operate independently:

testrail-start-run: If flag is passed and communication with TestRail is unsuccessful, exit with code 0 and don't print a value, or print 0 (not a valid test run id).

test: If flag is passed and no test run ID (or test run ID 0) is supplied, display an error but continue execution.

testrail-close-run:

• If flag is passed and no test run ID (or test run ID 0) is supplied, display an error and exit with code 0.
• If flag is passed and communication with TestRail is unsuccessful, exit with code 0 and print a message indicating as such.

Thanks for your work on this reporter and your consideration.