Add launchable integration

[ono-max]

@ko1 san allowed me to integrate Launchable into ruby/debug. By introducing Launchable, we can get the following benefits: For more details in Launchable Web Console, please take a look at https://app.launchableinc.com/organizations/demo/workspaces/demo/data/test-sessions.

Test reports in Github comments.

We can check the test results easily.

Rich UI to see stderr and stdout in failed tests

Analysis for Flakey tests

[cloudbees-smart-tests]

Launchable Report

❌ Test session #2603719 failed
_{🔔 no issues ✖️1 test failed ✔️63 tests passed}

❌ Test session #2603724 failed
_{🔔 no issues ✖️1 test failed ✔️63 tests passed}

❌ Test session #2603725 failed
_{🔔 no issues ✖️1 test failed ✔️63 tests passed}

Passed test sessions

✅ Test session #2603713 passed 
✅ Test session #2603714 passed 
✅ Test session #2603715 passed 
✅ Test session #2603716 passed 
✅ Test session #2603717 passed 
✅ Test session #2603718 passed 
✅ Test session #2603720 passed 
✅ Test session #2603721 passed 
✅ Test session #2603722 passed 
✅ Test session #2603727 passed 
✅ Test session #2603729 passed 
✅ Test session #2603730 passed 
✅ Test session #2603731 passed 
✅ Test session #2603732 passed 
✅ Test session #2603733 passed 
✅ Test session #2603734 passed 
✅ Test session #2603735 passed 
✅ Test session #2603737 passed 
✅ Test session #2603743 passed 
✅ Test session #2603755 passed 

Build: 08d401308a87c7aa8096a691490398da7bf5b07d