Introducing nightly builds

* Add opt-in for nightly builds using `update_fastlane(nightly: true)` (#8720) via Felix Krause
* Catch crashes in the crash reporter after being unreachable in China (#9263) via David Ohayon
* [scan] Reduce run time by removing report generation command as separate process (#7365) via Keaton Greve
* Create log archive directory in case it doesn’t exist (#9246) via Lyndsey Ferguson
* [slack] Fix crash when defining FL_SLACK_DEFAULT_PAYLOADS (#9217) via Liam Nichols
* Skip error message when no simulator wasn't provided (#9240) via Felix Krause
* Add a EOF newline in the pluginfile content if its not already there (#8942) via Josh Lesch
* Rescue exceptions when crash reporter cannot write out status file (#9245) via Mark Pirri
* TestFairy option checking only checked for symbols, not strings (#9257) via Joshua Liebowitz

https://github.com/fastlane/fastlane/releases/tag/2.34.0
