chore: Cleanups for `write_appdata_frames` #2354

Job	Run time
Build & test (ubuntu-latest, 1.74.0, debug)	10m 6s
Build & test (ubuntu-latest, stable, debug)	10m 10s
Build & test (ubuntu-latest, nightly, debug)	9m 46s
Build & test (macos-14, 1.74.0, debug)	8m 58s
Build & test (macos-14, stable, debug)	7m 1s
Build & test (macos-14, nightly, debug)	7m 5s
Build & test (windows-latest, 1.74.0, debug)	19m 55s
Build & test (windows-latest, stable, debug)	20m 41s
Build & test (windows-latest, nightly, debug)	20m 26s
Build & test (ubuntu-latest, stable, release)	16m 4s
Benchmark / Benchmark	24m 14s
	2h 34m 26s

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