Mongodb install action only works on ubuntu

So we test install only ubuntu + osx
and go back to linux only for install + tests

This should also catch any inconsistencies between the dev setup and the test
setup scripts (similar to e-mission/e-mission-docs#513 (comment))

.github/workflows/osx-ubuntu-manual-install.yml

@@ -0,0 +1,67 @@
+name: osx-ubuntu-manual-install
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    - cron:  '5 4 * * 0'
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-16.04, ubuntu-18.04, ubuntu-latest, macos-latest]
+        include:
+        - os: macos-latest
+          PLATFORM: MacOSX-x86_64
+        - os: ubuntu-16.04
+          PLATFORM: Linux-x86_64
+        - os: ubuntu-18.04
+          PLATFORM: Linux-x86_64
+        - os: ubuntu-latest
+          PLATFORM: Linux-x86_64
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    - name: Check existing version of miniconda
+      shell: bash -l {0}
+      run: conda info -a
+
+    - name: Install miniconda
+      shell: bash -l {0}
+      run: |
+        source setup/setup_conda.sh ${{ matrix.PLATFORM }}
+        which conda
+
+    - name: Check whether the CI environment variable is set
+      shell: bash -l {0}
+      run: |
+        source "$HOME/miniconda/etc/profile.d/conda.sh"
+        echo $CI
+
+    - name: Setup the emission environment
+      shell: bash -l {0}
+      run: |
+        conda --version
+        which conda
+        source "$HOME/miniconda/etc/profile.d/conda.sh"
+        conda --version
+        source setup/setup.sh
+
+    - name: Teardown the emission environment
+      shell: bash -l {0}
+      run: |
+        source "$HOME/miniconda/etc/profile.d/conda.sh"
+        source setup/teardown.sh

.github/workflows/test-with-manual-install.yml

@@ -1,6 +1,6 @@
 # This is a basic workflow to help you get started with Actions
 
-name: test-with-manual-install
+name: ubuntu-only-test-with-manual-install
 
 # Controls when the action will run. Triggers the workflow on push or pull request
 # events but only for the master branch
@@ -21,16 +21,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-16.04, ubuntu-18.04, ubuntu-latest, macos-latest]
-        include:
-        - os: macos-latest
-          PLATFORM: MacOSX-x86_64
-        - os: ubuntu-16.04
-          PLATFORM: Linux-x86_64
-        - os: ubuntu-18.04
-          PLATFORM: Linux-x86_64
-        - os: ubuntu-latest
-          PLATFORM: Linux-x86_64
+        os: [ubuntu-16.04, ubuntu-18.04, ubuntu-latest]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -49,7 +40,7 @@ jobs:
     - name: Install miniconda
       shell: bash -l {0}
       run: |
-        source setup/setup_conda.sh ${{ matrix.PLATFORM }}
+        source setup/setup_conda.sh Linux-x86_64
         which conda
 
     - name: Check whether the CI environment variable is set