NC | nsfs.js | Lower fork_utils dependancy down after process.env.NC_NSFS_NO_DB_ENV=true setting

[romayalon]

Explain the changes

Background:

1. VaccumAnalyzer issue hit once again after adding const { cluster } = require('../util/fork_utils'); dependency before setting process.env.NC_NSFS_NO_DB_ENV=true on nsfs.js.
2. The dependency chain causing the issue is as follows -
   nsfs.js -> require forks_utils -> requires prometheus_reporting -> requires stats_aggregator -> many files like system_store, bucket_server etc -> requires db_client -> requires postgres_client that setInterval() for VaccumAnalyzer.
3. Since process.env.NC_NSFS_NO_DB_ENV is false when requiring forks_utils, we will hit nsfs.js crash after 24 hours.

Changes:

1. nsfs.js | Lower fork_utils dependancy down to be after process.env.NC_NSFS_NO_DB_ENV=true setting.
2. config.js | moved vaccum analyzer interval to be a configuration called VACCUM_ANALYZER_INTERVAL instead of a constant.
3. nc_coretes | Set VACCUM_ANALYZER_INTERVAL = 1 on NC_CORETEST config.json so every time we will have a higher dependency before setting process.env.NC_NSFS_NO_DB_ENV=true we will fail.

Issues: Fixed #xxx / Gap #xxx

Testing Instructions:

Manual no code changes -

1. Keep nsfs.js running for more than 24 hours.

Manual with setting config/code changes -

1. Edit config.json/config.js (code) and set VACCUM_ANALYZER_INTERVAL=1;
2. Start nsfs.js and expect to not fail with -

[32mJun-25 10:43:04.141�[35m [nsfs/24010] �[31m[ERROR]�[39m core.util.postgres_client:: postgres_client: T00000000|Q00000001: failed with error: TypeError: Cannot read properties of undefined (reading 'query')
at _do_query �noobaa-core/src/util/postgres_client.js:254:37)�[
at PostgresTable.single_query �(noobaa-core/�[39msrc/util/postgres_client.js:683:16)
at runNextTicks (node:internal/process/task_queues:60:5)�[
at listOnTimeout (node:internal/timers:540:9)
at process.processTimers (node:internal/timers:514:7)
at async Timeout.vacuumAndAnalyze [as _onTimeout](noobaa-core/�[39msrc/util/postgres_client.js:704:13)

Automatic tests -

1. Run sudo NC_CORETEST=true node --trace-warnings ./node_modules/mocha/bin/mocha noobaa-core/src/test/unit_tests/test_bucketspace.js
2. Check error message above does not appear at the run logfile and that all the tests passed successfully.

• Doc added/updated
• Tests added