fix(e2e script): backport from 71 fixes to the E2E script (#35477)

Summary:
Because the /scripts folder for some reason is not typechecked at all, some changes broke the script and went undetected until we tried running it. This is a backport of those fixes:
* https://github.com/facebook/react-native/commit/67c373ff3a4ab0dfaaa752f08f6cc22657d4dadc
* https://github.com/facebook/react-native/commit/6107793fda11a85297b3a3e2b8f259930d6c0f41
* https://github.com/facebook/react-native/commit/6107793fda11a85297b3a3e2b8f259930d6c0f41

Also, it's backporting an improvement to the e2e local script clean to remove the hermes-engine pod cache which has been proven annoyingly in the way while testing:
* https://github.com/facebook/react-native/commit/9979e38c7093ba78db5d5b4b11456c78592ea8c5

## Changelog

[Internal] [Fixed] - Fix e2e script not working and augment clean script

Pull Request resolved: https://github.com/facebook/react-native/pull/35477

Test Plan: Works on 0.71 ;)

Reviewed By: dmytrorykun

Differential Revision: D41530272

Pulled By: jacdebug

fbshipit-source-id: d45650d919ad5ef08438b307f122817d72771f46