partners[lint]: run pyupgrade to get code in line with 3.9 standards (#30781)

Using `pyupgrade` to get all `partners` code up to 3.9 standards
(mostly, fixing old `typing` imports).

libs/partners/ollama/scripts/check_imports.py

@@ -1,4 +1,5 @@
 """load multiple Python files specified as command line arguments."""
+
 import sys
 import traceback
 from importlib.machinery import SourceFileLoader