feat: Automated symbols upload for iOS w/ bitcode

[bitsandfoxes]

Things this PR aims to accomplish:

1. Adding a sentry.properties to the Xcode project
2. Adding the sentry-cli executable to the Xcode project (this way we make sure the Xcode project does not rely on a file located inside a Unity package e.g. exporting on Windows and building on a mac)
3. Appending a shellscript to the build phases that checks for the bitcode flag and runs sentry-cli at the appropriate path

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 5afef86

[bruno-garcia]

Closed/reopen to trigger CI again. It had only passed "Danger"