Review repository urls of network configs

[nflaig]

• [x] Layout of upstream network config repository is being changed https://github.com/eth-clients/holesky/pull/104. Need to review that we still pull the configs from the right path for each network.

https://github.com/ChainSafe/lodestar/blob/deafa4f162860b7677cd0b63f32eab4b47d206d4/packages/cli/src/networks/holesky.ts#L6-L7

• [ ] There are also changes done in Lighthouse https://github.com/sigp/lighthouse/pull/5850, renaming deploy_block.txt which we use in our sim tests to configure Lighthouse.

https://github.com/ChainSafe/lodestar/blob/deafa4f162860b7677cd0b63f32eab4b47d206d4/packages/cli/test/utils/crucible/clients/validator/lighthouse.ts#L68

[nflaig]

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

[nflaig]

Completed by https://github.com/ChainSafe/lodestar/pull/7364