Add config option to disable node io detention

[guymguym]

Explain the changes

1. Backing store over TMFS have longer delays.
2. Added config.NODE_IO_DETENTION_DISABLE that can be set true to allow keeping the nodes active and not get into detention.
3. We already had config.NODE_IO_DETENTION_THRESHOLD that could be tweaked separately to shorten or zero the time that detention is applied, before it gets reset, but this still allows the node to enter detention and disconnect
4. Cleaned 3 unused configs - LONG_GONE_THRESHOLD, SHORT_GONE_THRESHOLD, LONG_BUILD_THRESHOLD.
5. Moved local constants from nodes_monitor to config, just in case we want to override it.

Issues: Fixed #xxx / Gap #xxx

1. NA

Testing Instructions:

1. NA

[liranmauda]

LGTM