ci: Further tweaks to building NSS #1639

Job	Run time
Build & test (ubuntu-latest, 1.74.0, debug)	7m 57s
Build & test (ubuntu-latest, stable, debug)	7m 54s
Build & test (ubuntu-latest, nightly, debug)	7m 45s
Build & test (macos-14, 1.74.0, debug)	6m 58s
Build & test (macos-14, stable, debug)	6m 49s
Build & test (macos-14, nightly, debug)	6m 57s
Build & test (windows-latest, 1.74.0, debug)	16m 43s
Build & test (windows-latest, stable, debug)	17m 17s
Build & test (windows-latest, nightly, debug)	15m 54s
Build & test (ubuntu-latest, stable, release)	9m 30s
Benchmark / Benchmark	8m 39s
	1h 52m 23s

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