Fix PyAMI configuration loading compatibility with Python 3.12 and newer.
Replace the removed ConfigParser.readfp() method with read_file(),
which provides equivalent functionality.
--- ../boto/pyami/config.py	2026-10-18 00:34:46.145591296 +0300
+++ ../boto/pyami/config.py	2026-10-18 00:35:02.127472893 +0300
@@ -58,7 +58,7 @@
             if path:
                 self.load_from_path(path)
             elif fp:
-                self.readfp(fp)
+                self.read_file(fp)
             else:
                 self.read(BotoConfigLocations)
             if "AWS_CREDENTIAL_FILE" in os.environ: