Revert D68396999: Update testmaingen #7570

Job	Run time
Get the latest prelude hash	2s
build (ubuntu-22.04, aarch64-unknown-linux-gnu, true)	13m 58s
build (ubuntu-22.04, aarch64-unknown-linux-musl, true)	13m 58s
build (ubuntu-22.04, x86_64-unknown-linux-gnu)	12m 28s
build (ubuntu-22.04, x86_64-unknown-linux-musl, true)	10m 31s
build (macos-13, aarch64-apple-darwin, true)	14m 48s
build (macos-13, x86_64-apple-darwin)	13m 50s
build (windows-2022, x86_64-pc-windows-msvc, true)	19m 12s
Publish buck2.build	3m 26s
Check if there's a release for this half of the month already	5s
Release `latest` tag	31s
Release bi-monthly tag	0s
	1h 42m 49s

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