NC | Fix node warning: Accessing non-existent property 'key' of module exports inside circular dependency

[romayalon]

Explain the changes

1. A new node dependency warning started showing after merging PR when running NC nsfs/CLI -

(node:30731) Warning: Accessing non-existent property 'NOOBAA_LOG_LEVEL' of module exports inside circular dependency
(Use `node --trace-warnings ...` to show where the warning was created)
2025-03-02 18:51:49.362704 [PID-30731/TID-8963] [L1] FS::FSWorker::Execute: Readfile 
(node:30731) Warning: Accessing non-existent property 'UV_THREADPOOL_SIZE' of module exports inside circular dependency
(node:30731) Warning: Accessing non-existent property 'GPFS_DL_PATH' of module exports inside circular dependency

Attaching logs when running with --node-trace-warnings at the additional details section.
The fix added in this PR avoids accessing non existing properties in config but it won't fix the circular dependency.

2. Added a default of gpfs lib location.

Additional Details -

(node:31086) Warning: Accessing non-existent property 'NOOBAA_LOG_LEVEL' of module exports inside circular dependency
    at emitCircularRequireWarning (node:internal/modules/cjs/loader:937:11)
    at Object.get (node:internal/modules/cjs/loader:953:5)
    at noobaa-core/config.js:1123:19
    at Array.forEach (<anonymous>)
    at _set_nc_config_to_env (noobaa-core/config.js:1122:34)
    at load_nsfs_nc_config (noobaa-core/config.js:1189:5)
    at Object.<anonymous> (noobaa-core/config.js:1238:1)
    at Module._compile (node:internal/modules/cjs/loader:1467:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1551:10)
    at Module.load (node:internal/modules/cjs/loader:1282:32)
(node:31086) Warning: Accessing non-existent property 'UV_THREADPOOL_SIZE' of module exports inside circular dependency
    at emitCircularRequireWarning (node:internal/modules/cjs/loader:937:11)
    at Object.get (node:internal/modules/cjs/loader:953:5)
    at noobaa-core/config.js:1123:19
    at Array.forEach (<anonymous>)
    at _set_nc_config_to_env (noobaa-core/config.js:1122:34)
    at load_nsfs_nc_config (noobaa-core/config.js:1189:5)
    at Object.<anonymous> (noobaa-core/config.js:1238:1)
    at Module._compile (node:internal/modules/cjs/loader:1467:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1551:10)
    at Module.load (node:internal/modules/cjs/loader:1282:32)
(node:31086) Warning: Accessing non-existent property 'GPFS_DL_PATH' of module exports inside circular dependency
    at emitCircularRequireWarning (node:internal/modules/cjs/loader:937:11)
    at Object.get (node:internal/modules/cjs/loader:953:5)
    at noobaa-core/config.js:1123:19
    at Array.forEach (<anonymous>)
    at _set_nc_config_to_env (noobaa-core/config.js:1122:34)
    at load_nsfs_nc_config (noobaa-core/config.js:1189:5)
    at Object.<anonymous> (noobaa-core/config.js:1238:1)
    at Module._compile (node:internal/modules/cjs/loader:1467:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1551:10)
    at Module.load (node:internal/modules/cjs/loader:1282:32)

Issues: Fixed #xxx / Gap #xxx

1. Open a gap about the circular dependencies found in this file.

Testing Instructions:

• Doc added/updated
• Tests added

[shirady]

LGTM
I added a minor comment and a question