Do not Recommend python2.7 on Fedora 41+

- https://fedoraproject.org/wiki/Changes/RetirePython2.7

Also, make the CI test ready for the retirement.

tests/tests.yml

@@ -30,9 +30,9 @@
     - all_supplementing_pythons:
         dir: tests
         run: ./all_supplementing_pythons.py
-    - smoke27:
+    - smoke27_optional:
         dir: python/smoke
-        run: VERSION=2.7 METHOD=virtualenv ./venv.sh
+        run: VERSION=2.7 INSTALL_OR_SKIP=true METHOD=virtualenv ./venv.sh
     - smoke36:
         dir: python/smoke
         run: VERSION=3.6 ./venv.sh
@@ -81,7 +81,6 @@
     required_packages:
     - gcc
     - virtualenv
-    - python2.7
     - python3.6
     - python3.8
     - python3.9
@@ -89,7 +88,6 @@
     - python3.11-devel
     - python3.12-devel
     - python3.13-devel
-    - python2-devel
     - pypy3.9-devel
     - pypy3.10-devel
     - python3-tox