[fix/fastlane-release-12.3] Adopt Fastlane to xcstrings usage

[hosy]

Description

Updated Fastlane build pipeline to replace the ownCloud app name in XCStrings CFBundleDisplayName, instead of the no longer existing InfoPlist.strings file.

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• Added an issue with details about all relevant changes in the iOS documentation repository.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• Added changelog files for the fixed issues in folder changelog/unreleased