ATLASRECTS-7362 : Fix TrkEventAthenaPoolTest

ATLASRECTS-7362 : Fix TrkEventAthenaPoolTest

Being too over-eager to also provide bool operator for FitQuality (not just FitQualityOnSurface) changes the semantics of what the Dumper prints. It assumed it got a nullptr so was printing null rather that a default set Fitquality

Let's remove it from the FitQuality and leave that as was. The FitQualityOnSurface can have it , and this is where I kind of used it for when moving away from ptr semantics.

ping @ssnyder , @fwinkl, @nstyles .

So for these should not need any reference changes. I know locally that TrkEventAthenaPoolTest now pass.

PS I see also TrackParticleAthenaPool_TrackParticleTPCnv_16.6.3_ctest ... Passed 112.47 sec after this change

100% tests passed, 0 tests failed out of 30

Label Time Summary:
TrackParticleAthenaPool    = 298.60 sec*proc (3 tests)
TrkEventAthenaPool         = 613.48 sec*proc (6 tests)
TrkEventTPCnv              =  10.11 sec*proc (15 tests)
TrkExTools                 =   0.20 sec*proc (2 tests)
TrkTrackSummaryTool        =   2.10 sec*proc (1 test)
TrkVKalVrtFitter           =  19.13 sec*proc (1 test)
TrkVertexFitters           =  34.95 sec*proc (2 tests)