setup venv in yamato commands

.yamato/python-ll-api-test.yml

   variables:
     UNITY_VERSION: {{ editor.version }}
   commands:
+    - sudo apt-get update && sudo apt-get install -y python3-venv
+    - python3 -m venv venv
+    - source venv/bin/activate
     - python3 -m pip install pyyaml --index-url https://artifactory.prd.it.unity3d.com/artifactory/api/pypi/pypi/simple
     - python3 -u -m ml-agents.tests.yamato.setup_venv
     - ./venv/bin/python ml-agents/tests/yamato/scripts/run_llapi.py
   triggers:
     cancel_old_ci: true
     expression: |
-      (pull_request.target eq "master" OR
-      pull_request.target match "release.+") AND
+      #(pull_request.target eq "master" OR
+      #pull_request.target match "release.+") AND
       NOT pull_request.draft AND
       (pull_request.changes.any match "com.unity.ml-agents/**" OR
       pull_request.changes.any match "Project/**" OR

.yamato/training-int-tests.yml

   variables:
     UNITY_VERSION: {{ editor.version }}
   commands:
+    - sudo apt-get update && sudo apt-get install -y python3-venv
+    - python3 -m venv venv
+    - source venv/bin/activate
-  dependencies:
-    - .yamato/standalone-build-test.yml#test_linux_standalone_{{ editor.version }}
+#  dependencies:
+#    - .yamato/standalone-build-test.yml#test_linux_standalone_{{ editor.version }}
-      (pull_request.target eq "master" OR
-      pull_request.target match "release.+") AND
+      #(pull_request.target eq "master" OR
+      #pull_request.target match "release.+") AND
       NOT pull_request.draft AND
       (pull_request.changes.any match "com.unity.ml-agents/**" OR
       pull_request.changes.any match "com.unity.ml-agents.extensions/**" OR
     - python3 -u -m ml-agents.tests.yamato.standalone_build_tests --build-target=mac
     - python -u -m ml-agents.tests.yamato.training_int_tests --python=0.16.0
     - python -u -m ml-agents.tests.yamato.training_int_tests --csharp={{ csharp_backcompat_version }}
-  dependencies:
-    - .yamato/standalone-build-test.yml#test_linux_training_int_{{ editor_version }}
+#  dependencies:
+#    - .yamato/standalone-build-test.yml#test_linux_training_int_{{ editor_version }}
-      (pull_request.target eq "master" OR
-      pull_request.target match "release.+") AND
+      #(pull_request.target eq "master" OR
+      #pull_request.target match "release.+") AND
       NOT pull_request.draft AND
       (pull_request.changes.any match "com.unity.ml-agents/**" OR
       pull_request.changes.any match "com.unity.ml-agents.extensions/**" OR

ml-agents/tests/yamato/yamato_utils.py

         venv_path += "_" + mlagents_python_version
 
     # Set up the venv and install mlagents
-    if platform == "linux":
-        subprocess.check_call(
-            "sudo apt-get update && sudo apt-get install -y python3-venv", shell=True
-        )
+    # if platform == "linux":
+    #     subprocess.check_call(
+    #         "sudo apt-get update && sudo apt-get install -y python3-venv", shell=True
+    #     )
-    subprocess.check_call(f"python3 -m venv {venv_path}", shell=True)
+    if platform == "darwin":
+        subprocess.check_call(f"python3 -m venv {venv_path}", shell=True)
+
     pip_commands = ["--upgrade pip", "--upgrade setuptools"]
     if mlagents_python_version:
         # install from pypi