[ALICE3] Pass number of silicon hits to the track and store it.

[axti98]

@njacazio As discussed some days ago: The number of nSiliconHits are not passed to the Track table and thus it can not be cut on this later in the analysis. For the FastTracker the nSiliconHits are just propagated. For smearing, where we dont have directly a number of hits the minimum amount is passed to the track.

[alibuild]

Error while checking build/O2Physics/o2 for 18a141b at 2026-03-05 09:52:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/15265-slc9_x86-64/0/ALICE3/TableProducer/OTF/onTheFlyTracker.cxx:1528:11: error: conflicting declaration 'int nHits'
/sw/SOURCES/O2Physics/15265-slc9_x86-64/0/ALICE3/TableProducer/OTF/onTheFlyTracker.cxx:1531:37: error: no match for 'operator=' (operand types are 'std::vector<int>' and 'o2::framework::Configurable<int>')
/sw/SOURCES/O2Physics/15265-slc9_x86-64/0/ALICE3/TableProducer/OTF/onTheFlyTracker.cxx:1536:74: error: no match for 'operator=' (operand types are 'std::vector<int>' and 'int')
/sw/SOURCES/O2Physics/15265-slc9_x86-64/0/ALICE3/TableProducer/OTF/onTheFlyTracker.cxx:1537:19: error: no match for 'operator<' (operand types are 'std::vector<int>' and 'o2::framework::Configurable<int>')
/sw/SOURCES/O2Physics/15265-slc9_x86-64/0/ALICE3/TableProducer/OTF/onTheFlyTracker.cxx:1572:139: error: no matching function for call to 'OnTheFlyTracker::TrackAlice3::TrackAlice3(<brace-enclosed initializer list>)'
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 2478cfc at 2026-03-05 10:02:

No log files found

Full log here.