Enable leak detector on nplb in CI

[sacuff]

Bug: 477257357

[github-actions]

🤖 Gemini Suggested Commit Message

---

ci: Enable leak detector for nplb

Include the nplb target in the API leak detector GitHub action. This
ensures that Starboard API symbol leaks are identified during the
continuous integration process for the nplb test suite.

Bug: 477257357

---

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[gemini-code-assist]

Code Review

This pull request updates the API leak detector action to also run against the 'nplb' target and modifies the leak detector script to reset the 'removed' leak count when checking non-default targets. A review comment suggests resetting 'removed' using 'type(removed)()' to maintain type consistency and prevent potential type errors.

[gemini-code-assist]

To maintain type consistency and avoid potential runtime TypeErrors or static analysis issues, it is safer to reset removed to an empty instance of its original type (e.g., if removed is a list or set of symbols rather than an int). Using type(removed)() dynamically creates the correct empty/falsy value regardless of whether removed is an integer, list, or set.

Suggested change

	if args.target != _DEFAULT_TARGET:
	removed = 0
	if args.target != _DEFAULT_TARGET:
	removed = type(removed)()