chore: Consolidate build scripts to the new shared script

Co-authored-by: Janne Savolainen <janne.savolainen@live.fi>
Signed-off-by: Iku-turso <mikko.aspiala@gmail.com>
Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

packages/technical-features/application/legacy-extensions/package.json

@@ -25,7 +25,7 @@
   "homepage": "https://github.com/lensapp/lens",
   "scripts": {
     "clean": "rimraf dist/",
-    "build": "webpack",
+    "build": "lens-webpack-build",
     "lint": "lens-lint",
     "lint:fix": "lens-lint --fix"
   },
@@ -33,6 +33,7 @@
     "@ogre-tools/injectable": "^15.3.1"
   },
   "devDependencies": {
+    "@k8slens/webpack": "^6.5.0-alpha.4",
     "@k8slens/eslint-config": "^6.5.0-alpha.2"
   }
 }