Build ios release and push to testflight

[ShaunKav]

This is PR adds:

• New lane in our iOS Fastlane called build_ci.
• New GitHub Action release-ios which can be triggered manually or called by another action.
• Generates a new build and uploads it to testflight.

As it's a new Action GitHub disables the ability to pass inputs on workflow dispatch until it's committed to main so I was unable to test the last commit which added input variables 'version' and 'build'. I will confirm they're working as expected once merged.