update test gdx files, relax checkSummation

[orichters]

• merge only after https://github.com/pik-piam/modelstats/pull/112 is merged and the first AMT file is uploaded
• release run is from /p/projects/remind/runs/REMIND_master_2024_06_18/remind/output/SSP2-EU21-PkBudg650_2024-06-18_22.43.19
• relax Summation checks as discussed here: https://github.com/remindmodel/development_issues/issues/306

[orichters]

Remaining summation errors for AMT runs, and very similar for the release version --> https://github.com/pik-piam/remind2/issues/552

Carbon Management|Carbon Capture >
   + Carbon Management|Carbon Capture|+|Biomass|Pe2Se
   + Carbon Management|Carbon Capture|+|Fossil|Pe2Se
   + Carbon Management|Carbon Capture|+|Industry Energy
   + Carbon Management|Carbon Capture|+|Industry Process
   + Carbon Management|Carbon Capture|+|Waste|Plastics Incineration
   + Carbon Management|Carbon Capture|+|DAC
Relative difference between 0.271% and 28.8%, absolute difference up to 0.632 Mt CO2/yr.

Carbon Management|Storage >
   + Carbon Management|Storage|+|Biomass|Pe2Se
   + Carbon Management|Storage|+|Fossil|Pe2Se
   + Carbon Management|Storage|+|Industry Energy
   + Carbon Management|Storage|+|Industry Process
   + Carbon Management|Storage|+|Waste|Plastics Incineration
   + Carbon Management|Storage|+|DAC
Relative difference between 0.214% and 28.8%, absolute difference up to 0.572 Mt CO2/yr.