perf: Reduce memory consumption (acts-project#1973)

We have three vectors (of `std::size_t`) that call a reserve of these values. Reduce the number to 100 since it makes no sense we have 1000000000 seed candidates for a single middle SP ... not even for ITk at PU200

/cc @LuisFelipeCoelho

Author: CarloVarni

Examples/Python/python/acts/examples/itk.py

@@ -481,8 +481,8 @@ def itkSeedingAlgConfig(inputSpacePointsType: InputSpacePointsType):
         numSeedIncrement = 1
         seedWeightIncrement = 10100
         useDetailedDoubleMeasurementInfo = True
-        maxSeedsPerSpMConf = 1000000000
-        maxQualitySeedsPerSpMConf = 1000000000
+        maxSeedsPerSpMConf = 100
+        maxQualitySeedsPerSpMConf = 100
         useDeltaRorTopRadius = False
 
     # fill namedtuples