Prepare 3.10.0-beta release (#313)

This diff implements part of the release checklist at https://github.com/ooni/probe/issues/1439. The plan is to bless a beta release and use it for further testing on Android devices. Afterward, we need to apply some extra changes to the `cli` (including https://github.com/ooni/probe-cli/pull/314 and https://github.com/ooni/probe-cli/pull/312). Finally, we will bless a full 3.10.0 release.

.github/workflows/android.yml

@@ -19,6 +19,3 @@ jobs:
       - run: ./build-android.bash
         env:
           ANDROID_HOME: /usr/local/Caskroom/android-sdk/4333796
-      - run: ./publish-android.bash
-        env:
-          MOBILE_BINTRAY_API_KEY: ${{ secrets.MOBILE_BINTRAY_API_KEY }}

.github/workflows/ios.yml

@@ -13,6 +13,3 @@ jobs:
           go-version: "1.16"
       - uses: actions/checkout@v2
       - run: ./build-ios.bash
-      - run: ./publish-ios.bash
-        env:
-          MOBILE_BINTRAY_API_KEY: ${{ secrets.MOBILE_BINTRAY_API_KEY }}