ci(dev_env): Test development environment on Big Sur and Ubuntu (#23703)

We have users out in the wild using `brew` on Linux (see [PR](https://github.com/getsentry/sentry/pull/23002)), thus, we will serve our community by testing the development environment there as well.

I'm also adding Big Sur back into the matrix (even if it's slower to execute) in order
to make sure we don't regress it when we make changes to the shared Brewfile.

.github/workflows/development-environment.yml

@@ -1,4 +1,4 @@
-name: development environment
+name: dev env
 on:
   pull_request:
     paths:
@@ -11,12 +11,17 @@ on:
 
 jobs:
   dev-environment:
-    name: python set up
+    name: set up
     runs-on: ${{ matrix.os }}
-    timeout-minutes: 20
+    timeout-minutes: 25
     strategy:
       matrix:
-        os: [ macos-latest ]
+        # macosx-10.15 is Catalina
+        # macosx-11.0 is Big Sur, however, it takes long for jobs to get started
+        # Using Ubuntu 18 until I figure out this error:
+        # -> ImportError: libffi.so.6: cannot open shared object file: No such file or directory
+        os: [ macos-10.15, macos-11.0, ubuntu-18.04 ]
+      fail-fast: false
     env:
       PIP_DISABLE_PIP_VERSION_CHECK: on
       # Make the environment more similar to what Mac defaults to
@@ -26,22 +31,18 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Set environment variables & others
-        if: ${{ runner.os == 'macOS' }}
         run: |
           echo "VOLTA_HOME=$HOME/.volta" >> $GITHUB_ENV
           echo "PATH=$HOME/.volta/bin:$PATH" >> $GITHUB_ENV
           touch "$HOME/.zshrc"
 
       - name: Install prerequisites
-        if: ${{ runner.os == 'macOS' }}
-        # Depending on the host watchman will not install (read: intermittent issue),
-        # thus, we mark this as continue-on-error
-        continue-on-error: true
         # Xcode CLI & brew are already installed, thus, no need to call xcode-select install
         # XXX: Can the Brew set up be cached?
+        # Sometimes, brew needs to be updated before brew bundle would work
         # If you want to speed up the CI for your PR, you can use --no-upgrade and HOMEBREW_NO_AUTO_UPDATE=1
         run: |
-          brew bundle
+          brew bundle || brew update && brew bundle
 
       - name: Install Python (via Pyenv)
         id: python-version