TrigCost: Read algorithm hashes from file

Read hashes for algorithms names that are not included in any chain (for example conditions algorithms) from TrigCostRootAnalysis/hashes2string_18022021.txt file.

Tagging @tamartin @dguest @mark

Part of the diff for Table_Algorithm_HLT (with algorithm names):

< AtlasFieldCacheCondAlg
< AtlasFieldMapCondAlg
< BeamSpotCondAlg
< Calo_electronicNoiseAlg
< DecisionSummaryMakerAlg
< InDetSiDetElementBoundaryLinksPixelCondAlg
< InDetTrigMTTRT_DetElementsRoadCondAlg_xk
< InDet__SiDetElementsRoadCondAlg_xk
< JetTagCalibCondAlg
< L1Decoder
< MdtCalibDbAlg
< MdtCondDbAlg
< PixelAlignCondAlg
< PixelChargeCalibCondAlg
< PixelDCSCondHVAlg
< PixelDCSCondStateAlg
...
< RIO_OnTrackErrorScalingCondAlg
< RegSelCondAlg_CSC
< RegSelCondAlg_FCALEM
< RegSelCondAlg_FCALHAD
...
< SCTSiLorentzAngleCondAlg
< SCT_AlignCondAlg
< SCT_ConfigurationCondAlg
...
< TileEMScaleCondAlg
< TriggerSummaryFinal
< TriggerSummaryStep1
< TriggerSummaryStep2
...
---
> UNKNOWN HASH ID