MuonR4 - Fast digitization restructure Rpc & Tgc

• Rpc fast digitization : Remove duplicated code creating a prd and filling it into the container. Insert several checks to ensure that the digit is well within the active area
• Tgc fast digitization: Broaden the width of the Gaussian to the Width of the complete wire group / to the width of the radial strip. Remove duplicated code to create & fill the Tgc Prd.