[no-ticket] Enable activate-build-cache-for-xcode for all firefox build steps

[clarmso]

📜 Tickets

💡 Description

Bitrise build caching has been available for Firefox iOS. My preliminary investigation says the caching saves about 1 min of build time. Here's the before and after comparison:

https://app.bitrise.io/build-cache/095364a9afb324b2/invocations?tool=xcode&command=build-for-testing&page=1&invocation1=15ba203b-562c-4b08-b214-9a4a273c5db6&invocation2=ee591906-7d8f-48d0-90de-74c8ad0d0616

We may turn on this setting for all xcode-build-for-test and the steps that involve building the app.

The log tells me the new step is running and uses the following setting:

[20:29:06] Activate Bitrise Build Cache for Xcode
Activate Xcode params: {BuildCacheEnabled:true BuildCacheEndpoint: DebugLogging:false Silent:false XcodePathOverride: XcrunPathOverride: ProxySocketPathOverride: PushEnabled:true XcodebuildTimestampsEnabled:false}

🎥 Demos

Before	After

Demo

📝 Checklist

• I filled in the ticket numbers and a description of my work
• I updated the PR name to follow our PR naming guidelines
• I ensured unit tests pass and wrote tests for new code
• If working on UI, I checked and implemented accessibility (Dynamic Text and VoiceOver)
• If adding telemetry, I read the data stewardship requirements and will request a data review
• If adding or modifying strings, I read the guidelines and will request a string review from l10n
• If needed, I updated documentation and added comments to complex code

[mobiletest-ci-bot]

🧹 Tidy commit

Just 1 file(s) touched. Thanks for keeping it clean and review-friendly!

💬 Description craftsman

Great PR description! Reviewers salute you 🫡

✅ Per-file coverage

All changed files meet the threshold of 35.0%.

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