ci: build python2 from source (#33793)

* ci: add python2 to publish jobs

* chore: install python2 via circle

.circleci/build_config.yml

@@ -511,7 +511,8 @@ step-install-python2-on-mac: &step-install-python2-on-mac
     name: Install python2 on macos
     command: |
       if [ "`uname`" == "Darwin" ]; then
-        brew install vertedinde/python2/python@2
+        curl -O https://www.python.org/ftp/python/2.7.18/python-2.7.18-macosx10.9.pkg
+        sudo installer -pkg python-2.7.18-macosx10.9.pkg -target /
       fi
 
 step-gn-gen-default: &step-gn-gen-default
@@ -1532,6 +1533,7 @@ commands:
             - *step-depot-tools-get
       - *step-depot-tools-add-to-path
       - *step-restore-brew-cache
+      - *step-install-python2-on-mac
       - *step-get-more-space-on-mac
       - when:
           condition: << parameters.checkout >>