ignore .idea directory in dart analyzer and analyzer benchmark output (#55235)

diff --git a/dev/bots/analyze.dart b/dev/bots/analyze.dart
index 35bac6d..2e4ae1c 100644
--- a/dev/bots/analyze.dart
+++ b/dev/bots/analyze.dart
@@ -1151,6 +1151,8 @@
         continue;
       if (path.basename(entity.path) == '.git')
         continue;
+      if (path.basename(entity.path) == '.idea')
+        continue;
       if (path.basename(entity.path) == '.gradle')
         continue;
       if (path.basename(entity.path) == '.dart_tool')