MM-53919 Add imagemin-gifsicle and imagemin-mozjpeg as required dependencies (#26118)

webapp/channels/package.json

@@ -158,6 +158,8 @@
     "html-webpack-plugin": "5.5.0",
     "identity-obj-proxy": "3.0.0",
     "image-webpack-loader": "8.1.0",
+    "imagemin-gifsicle": "7.0.0",
+    "imagemin-mozjpeg": "9.0.0",
     "isomorphic-fetch": "3.0.0",
     "jest": "29.7.0",
     "jest-canvas-mock": "2.5.0",