Don't cache the file object

The file object will be left at the end of the file after reading,
leading to other things that use it (like parse) trying to read from
EOF.

src/metpy/remote/aws.py

@@ -6,7 +6,6 @@
 """
 import bisect
 from datetime import datetime, timedelta
-from functools import cached_property
 import itertools
 from pathlib import Path
 import shutil
@@ -36,7 +35,7 @@ def url(self):
     def name(self):
         return Path(self.path).name
 
-    @cached_property
+    @property
     def file(self):
         return self._obj.get()['Body']