Make snowman use snowflake directly instead of snowball #8238

Job	Run time
e2e_post_etna	11m 2s
e2e_pre_etna	11m 6s
Lint	3m 25s
e2e_existing_network	4m 6s
Fuzz	14m 16s
Unit (macos-12)	5m 34s
Upgrade	3m 9s
Protobuf Lint	5s
Unit (ubuntu-20.04)	3m 57s
Up-to-date protobuf	23s
Up-to-date mocks	2m 6s
Unit (ubuntu-22.04)	6m 50s
Up-to-date go.mod and go.sum	11s
Build Antithesis avalanchego images	8m 33s
Unit (windows-2022)	7m 39s
Unit (custom-arm64-focal)	1s
Build Antithesis xsvm images	11m 40s
Unit (custom-arm64-jammy)	12m 57s
Image build	10m 32s
	1h 57m 32s

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