Refactor CI workflow to initialize micromamba shell and remove redundant activation commands

Author: karlnyr

.github/workflows/run_tests.yml

@@ -22,28 +22,25 @@ jobs:
         environment-file: environment.yml
         cache-downloads: true
 
+    - name: Initialize micromamba shell
+      run: |
+          eval "$(micromamba shell hook --shell bash)"
+          micromamba activate P_microSALT
+    
     - name: Activate Conda environment and install microSALT
       run: |
-        source ~/.bashrc
-        micromamba activate P_microSALT
         python -m pip install -r requirements.txt -r requirements-dev.txt
         python -m pip install -U .
 
     - name: Lint with flake8
       run: |
-        source ~/.bashrc
-        micromamba activate P_microSALT
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 
     - name: Test with pytest
       run: |
-        source ~/.bashrc
-        micromamba activate P_microSALT
         pytest --cov=microSALT tests
 
     - name: Run Coveralls
       run: |
-        source ~/.bashrc
-        micromamba activate P_microSALT
         coveralls