Use app-jit snapshot for flutter tools (#111459)

Author: jensjoha

bin/internal/shared.bat

@@ -171,9 +171,9 @@ GOTO :after_subroutine
     POPD
 
     IF "%FLUTTER_TOOL_ARGS%" == "" (
-      "%dart%" --verbosity=error --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.dart_tool\package_config.json" --no-enable-mirrors "%script_path%"
+      "%dart%" --verbosity=error --snapshot="%snapshot_path%" --snapshot-kind="app-jit" --packages="%flutter_tools_dir%\.dart_tool\package_config.json" --no-enable-mirrors "%script_path%" > NUL
     ) else (
-      "%dart%" "%FLUTTER_TOOL_ARGS%" --verbosity=error --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.dart_tool\package_config.json" "%script_path%"
+      "%dart%" "%FLUTTER_TOOL_ARGS%" --verbosity=error --snapshot="%snapshot_path%" --snapshot-kind="app-jit" --packages="%flutter_tools_dir%\.dart_tool\package_config.json" "%script_path%" > NUL
     )
     IF "%ERRORLEVEL%" NEQ "0" (
       ECHO Error: Unable to create dart snapshot for flutter tool. 1>&2

bin/internal/shared.sh

@@ -155,7 +155,7 @@ function upgrade_flutter () (
     pub_upgrade_with_retry
 
     # Compile...
-    "$DART" --verbosity=error --disable-dart-dev $FLUTTER_TOOL_ARGS --snapshot="$SNAPSHOT_PATH" --packages="$FLUTTER_TOOLS_DIR/.dart_tool/package_config.json" --no-enable-mirrors "$SCRIPT_PATH"
+    "$DART" --verbosity=error --disable-dart-dev $FLUTTER_TOOL_ARGS --snapshot="$SNAPSHOT_PATH" --snapshot-kind="app-jit" --packages="$FLUTTER_TOOLS_DIR/.dart_tool/package_config.json" --no-enable-mirrors "$SCRIPT_PATH" > /dev/null
     echo "$compilekey" > "$STAMP_PATH"
   fi
   # The exit here is extraneous since the function is run in a subshell, but