build(server): improve "node" folder cleanup

* remove useless symlinks to non-existing files (npm, npx -> the actual file gets deleted by "rm -r $BUILD_DIR/node/lib/node_modules/npm"
=> fixes #1499
(this time fully ;-))

* remove unused corepack

* remove useless CHANGELOG.md (LICENSE and README.md should of course still remain)

Author: pano9000

bin/build-server.sh

@@ -45,7 +45,9 @@ mv $NODE_FILENAME node
 cd ..
 
 
-rm -r $BUILD_DIR/node/lib/node_modules/npm \
+rm -r $BUILD_DIR/node/lib/node_modules/{npm,corepack} \
+    $BUILD_DIR/node/bin/{npm,npx,corepack} \
+    $BUILD_DIR/node/CHANGELOG.md \
     $BUILD_DIR/node/include/node \
     $BUILD_DIR/node_modules/electron* \
     $BUILD_DIR/electron*.{js,map}