fix: import path of networkConfig

[twoeths]

Motivation

• fix import issue introduced by feat: shared CustodyConfig on main thread and network thread #7632

Error [ERR_UNSUPPORTED_DIR_IMPORT]: Directory import '/usr/src/lodestar/packages/beacon-node/lib/network/subnets' is not supported resolving ES modules imported from /usr/src/lodestar/packages/beacon-node/lib/network/networkConfig.js
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:     at finalizeResolution (node:internal/modules/esm/resolve:254:11)
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:     at moduleResolve (node:internal/modules/esm/resolve:921:10)
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:     at defaultResolve (node:internal/modules/esm/resolve:1120:11)
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:     at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:557:12)
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:     at ModuleLoader.resolve (node:internal/modules/esm/loader:526:25)
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:     at ModuleLoader.getModuleJob (node:internal/modules/esm/loader:249:38)
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:     at ModuleJob._link (node:internal/modules/esm/module_job:126:49) {
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:   code: 'ERR_UNSUPPORTED_DIR_IMPORT',
Apr 13 08:18:20 devnet-ax41-0 beacon_run.sh[2274894]:   url: 'file:///usr/src/lodestar/packages/beacon-node/lib/network/subnets'

Description

• should not import folder path, import specific files instead

[wemeetagain]

🎉 This PR is included in v1.34.0 🎉