Review repository urls of network configs

[nflaig]

• Layout of upstream network config repository is being changed update repository layout eth-clients/holesky#104. Need to review that we still pull the configs from the right path for each network.

lodestar/packages/cli/src/networks/holesky.ts

Lines 6 to 7 in deafa4f

	export const bootnodesFileUrl =
	"https://raw.githubusercontent.com/eth-clients/holesky/main/custom_config_data/bootstrap_nodes.txt";

• There are also changes done in Lighthouse Rename deploy_block in network config sigp/lighthouse#5850, renaming deploy_block.txt which we use in our sim tests to configure Lighthouse.

lodestar/packages/cli/test/utils/crucible/clients/validator/lighthouse.ts

Line 68 in deafa4f

await writeFile(path.join(rootDir, "deploy_block.txt"), "0");

[nflaig]

Reopening until our sim tests are updated to work with latest Lighthouse release (see PR description for details)