Update Nix to 2.25.3, and release v0.32.0 #2544

Job	Run time
Lints	2m 47s
build-aarch64-darwin / Build aarch64 Darwin	11m 5s
build-aarch64-linux / Build aarch64 Linux (static)	12m 10s
build-x86_64-darwin / Build x86_64 Darwin	15m 47s
build-x86_64-linux / Build x86_64 Linux (static)	8m 56s
Run x86_64 Linux (No init, --determinate)	1m 42s
Run x86_64 Linux release checks	19m 46s
Run x86_64 Linux (--determinate)	1m 12s
Run x86_64 Linux (No init)	1m 36s
Run x86_64 Linux	59s
Run aarch64 Darwin (--determinate)	2m 4s
Run aarch64 Darwin	2m 9s
Run aarch64 Linux (--determinate)	1m 46s
Run aarch64 Linux	1m 18s
Run x86_64 Darwin (--determinate)	3m 24s
Run x86_64 Darwin	3m 45s
	1h 30m 26s

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