dependency updater: support large repos & simplify config #294

Job	Run time
geth (linux/amd64, ubuntu-24.04)	3m 29s
geth (linux/arm64, ubuntu-24.04-arm)	10m 57s
reth (linux/arm64, ubuntu-24.04-arm, jemalloc,optimism)	20m 30s
nethermind (linux/arm64, ubuntu-24.04-arm)	2m 48s
nethermind (linux/amd64, ubuntu-24.04)	2m 46s
reth (linux/amd64, ubuntu-24.04, jemalloc,asm-keccak,optimism)	26m 15s
	1h 6m 45s

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