[NoQA] Reduce memory allocation during derived values calculations

[VickyStash]

Explanation of Change

Replaces Object.entries iteration with Object.keys across the OnyxDerived config compute functions to avoid allocating a [key, value] tuple array per entry, and drops the {cardList, ...rest} object spread in cardFeedErrors in favor of iterating cards in place via forEachAssignedCard. Also collapses a .filter().map() chain into a single loop, cutting intermediate array allocations on these hot, frequently-recomputed derived values.

Fixed Issues

$ #93916
PROPOSAL: N/A

Tests

• Verify that no errors appear in the JS console

Offline tests

QA Steps

// TODO: These must be filled out, or the issue title must include "[No QA]."

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
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  • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
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[github-actions]

🚧 puneetlath has triggered a test Expensify/App build. You can view the workflow run here.

[github-actions]

🧪🧪 Use the links below to test this adhoc build on Android, iOS, and Web. Happy testing! 🧪🧪
Built from App PR #96320.

Android 🤖	iOS 🍎
⏩ SKIPPED ⏩	⏩ SKIPPED ⏩
The build for Android was skipped	The build for iOS was skipped

Web 🕸️
https://96320.pr-testing.expensify.com

---

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[VickyStash]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Bravo.

Reviewed commit: 5d73a0cd6d

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[melvin-bot]

@eh2077 Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]