[CI] Generate conda env directly with required packages

Author: JuliaSprenger

.github/workflows/caches_cron_job.yml

@@ -45,18 +45,18 @@ jobs:
         run: echo "Cache-hit == ${{steps.cache-conda-env.outputs.cache-hit == 'true'}}"
 
       # activate environment if not restored from cache
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v2.2.0
         if: steps.cache-conda-env.outputs.cache-hit != 'true'
         with:
           activate-environment: neo-test-env
+          environment-file: environment_testing.yml
           python-version: 3.9
 
       - name: Create the conda environment to be cached
         if: steps.cache-conda-env.outputs.cache-hit != 'true'
         # create conda env, configure git and install pip, neo and test dependencies from master
         # for PRs that change dependencies, this environment will be updated in the test workflow
         run: |
-          conda env update neo-test-env --file environment_testing.yml
           git config --global user.email "neo_ci@fake_mail.com"
           git config --global user.name "neo CI"
           python -m pip install -U pip  # Official recommended way