caching tweaks in the rn build

[kiftio]

What changes are you making?

• Add Gradle dependency/wrapper caching to React Native Android build and test jobs
• Add CocoaPods caching to the React Native iOS build job, matching the iOS test job
• Remove .turbo cache steps that were never saving because .turbo is not created by these workflows

Context

The RN CI logs showed that package-manager caches were already effective, but some native setup work was still cold:

• pnpm and Bundler caches were hitting
• iOS tests had a working CocoaPods cache, but iOS build did not
• Android RN jobs downloaded Gradle distributions during the job
• .turbo cache steps reported path validation warnings because no cache path existed

This keeps the change conservative: cache dependency/setup layers for PR/sample validation, but avoid riskier native build-output caches such as Xcode DerivedData, Gradle task outputs, NDK directories, or compiler caches.

Testing

• Parsed edited workflow YAML files with Ruby
• Ran git diff --check
• ran actionlint

How to test

Run builds

Before you merge

Important

• I've added tests to support my implementation
• I have read and agree with the Contribution Guidelines
• I have read and agree with the Code of Conduct
• I've updated the relevant platform README (platforms/swift/README.md and/or platforms/android/README.md)

---

Releasing a new Swift version?

• I have bumped the version in ShopifyCheckoutKit.podspec
• I have bumped the version in platforms/swift/Sources/ShopifyCheckoutKit/ShopifyCheckoutKit.swift
• I have updated platforms/swift/CHANGELOG.md
• I have updated the SwiftPM/CocoaPods version snippets in platforms/swift/README.md (major version only)

Releasing a new Android version?

• I have bumped the versionName in platforms/android/lib/build.gradle
• I have updated platforms/android/CHANGELOG.md
• I have updated the Gradle/Maven version snippets in platforms/android/README.md

Tip

See the Contributing documentation for the full release process per platform.

[github-actions]

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