Move CI to "ubuntu-latest"

.github/workflows/ci.yml

@@ -54,7 +54,7 @@ jobs:
           - "pypy3.9"
           - "pypy3.10"
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v4
@@ -70,6 +70,7 @@ jobs:
           # Be wary of running `pip install` here, since it becomes easy for us to
           # accidentally pick up typing_extensions as installed by a dependency
           cd src
+          python --version  # just to make sure we're running the right one
           python -m unittest test_typing_extensions.py
 
       - name: Test CPython typing test suite

.github/workflows/third_party.yml

@@ -312,7 +312,7 @@ jobs:
         checkout-ref: [ "main", "rel_2_0" ]
     # sqlalchemy tests fail when using the Ubuntu 24.04 runner
     # https://github.com/sqlalchemy/sqlalchemy/commit/8d73205f352e68c6603e90494494ef21027ec68f
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
       - name: Setup Python

src/test_typing_extensions.py

@@ -8844,9 +8844,12 @@ def test_name_lookup_without_eval(self):
         self.assertIs(evaluate_forward_ref(typing.ForwardRef("int"), globals={"int": str}), str)
         import builtins
 
-        from test import support
-        with support.swap_attr(builtins, "int", dict):
+        real_int = builtins.int
+        try:
+            builtins.int = dict
             self.assertIs(evaluate_forward_ref(typing.ForwardRef("int")), dict)
+        finally:
+            builtins.int = real_int
 
     def test_nested_strings(self):
         # This variable must have a different name TypeVar