Actually run flutter-dev from source (turns out bash is NP-hard) (#153863)

Fixes
flutter/flutter#153599 (comment).

Author: matanlurey

bin/internal/shared.sh

@@ -254,15 +254,15 @@ function shared::execute() {
   upgrade_flutter 7< "$SHARED_NAME"
 
   case "$BIN_NAME" in
-    flutter*)
+    flutter-dev)
       # FLUTTER_TOOL_ARGS aren't quoted below, because it is meant to be
       # considered as separate space-separated args.
-      exec "$DART" --disable-dart-dev --packages="$FLUTTER_TOOLS_DIR/.dart_tool/package_config.json" $FLUTTER_TOOL_ARGS "$SNAPSHOT_PATH" "$@"
+      exec "$DART" --packages="$FLUTTER_TOOLS_DIR/.dart_tool/package_config.json" $FLUTTER_TOOL_ARGS "$SCRIPT_PATH" "$@"
       ;;
-    flutter-dev*)
+    flutter*)
       # FLUTTER_TOOL_ARGS aren't quoted below, because it is meant to be
       # considered as separate space-separated args.
-      exec "$DART" --packages="$FLUTTER_TOOLS_DIR/.dart_tool/package_config.json" $FLUTTER_TOOL_ARGS "$SCRIPT_PATH" "$@"
+      exec "$DART" --disable-dart-dev --packages="$FLUTTER_TOOLS_DIR/.dart_tool/package_config.json" $FLUTTER_TOOL_ARGS "$SNAPSHOT_PATH" "$@"
       ;;
     dart*)
       exec "$DART" "$@"