fix: sanitize build-for-testing path for schemes with spaces, parentheses, etc.

[ncooke3]

This is for firebase/firebase-ios-sdk#15545

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[gemini-code-assist]

Summary of Changes

Hello @ncooke3, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a fix to the build-for-testing.sh script to handle Xcode scheme names that contain special characters such as spaces or parentheses. By sanitizing these scheme names for use in file paths, the script ensures that the derivedDataPath and subsequent file system operations (like changing directories and zipping build products) function correctly and reliably, preventing failures that could arise from invalid path characters.

Highlights

• Scheme Sanitization: The build-for-testing.sh script now sanitizes the Xcode scheme name (SCHEME) before using it in file paths. This involves removing parentheses and replacing spaces with underscores.
• Path Robustness: This change prevents potential issues with derivedDataPath and directory navigation when Xcode schemes contain special characters like spaces or parentheses, making the build process more robust.
• Consistent Path Usage: The newly introduced SCHEME_PATH variable, which holds the sanitized scheme name, is consistently used for defining DERIVEDDATAPATH and for navigating to the build products directory during the zipping process.

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[gemini-code-assist]

Code Review

This pull request addresses an issue where scheme names containing spaces or parentheses could create invalid file paths. The fix introduces a sanitized version of the scheme name for use in path construction, which is a good approach. I have provided one suggestion to improve the efficiency of the sanitization command by consolidating two separate tr processes into a single sed command.