Initialize nix setup for the repo #2294

Job	Run time
check	7m 6s
semanticdb-kotlinc	3m 47s
bazel_aspect	4m 36s
Tests (ubuntu-latest, 21)	9m 43s
Maven tests (11)	4m 44s
bazel	2m 36s
Tests (ubuntu-latest, 17)	13m 54s
Docker CLI tests (ubuntu-latest)	6m 48s
Tests (ubuntu-latest, 11)	17m 28s
Maven tests (21)	4m 40s
Maven tests (17)	4m 56s
	1h 20m 18s

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