Make snowman use snowflake directly instead of snowball #8240

Job	Run time
e2e_post_etna	11m 38s
e2e_pre_etna	11m 25s
Protobuf Lint	5s
e2e_existing_network	4m 11s
Fuzz	14m 14s
Up-to-date protobuf	25s
Lint	3m 10s
Unit (macos-12)	7m 10s
Upgrade	3m 10s
Up-to-date mocks	2m 2s
Unit (ubuntu-20.04)	3m 47s
Unit (ubuntu-22.04)	6m 53s
Unit (windows-2022)	9m 34s
Up-to-date go.mod and go.sum	9s
Unit (custom-arm64-focal)	1s
Unit (custom-arm64-jammy)	12m 44s
Build Antithesis avalanchego images	8m 18s
Build Antithesis xsvm images	12m 4s
Image build	10m 28s
	2h 1m 28s

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