GHA: update tests upload to akamai. Try installing python 3.11 before appdmg

.github/workflows/gh-hosted-eclipse-distro-build.yml

@@ -196,7 +196,7 @@ jobs:
 
   sign-osx-distros:
     needs: [ eclipse-distro-build ]
-    runs-on: macos-13-xl
+    runs-on: macos-latest-xl
     steps:
       - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
@@ -224,6 +224,7 @@ jobs:
           security unlock-keychain -p ${{ secrets.KEYCHAIN_PASSWORD }} $RUNNER_TEMP/app-signing.keychain-db
       - name: Install appdmg
         run: |
+          brew install python@3.11
           npm install -g appdmg
       - name: Download OSX tar.gz files from S3 for Signing/Notarization
         env: