Switching from EGamma ShowerShapeFudge to VariableCorrection Tool
New EGammaVariableCorrectionTool will be the main tool to correct the shower shapes variables (inputs to e/y identification) in release 22. Therefore, it's already a good time to switch to it. With this update, the tool will be nominal in PHYS derivation. No change is expected with respect to ElectronPhotonShowerShapeFudgeTool, both are synchronized (checked by @jdevivi and myself).