feat!: added ansible-galaxy requirements installation task; changed task name of python venv setup from venv:setup to setup:venv

Taskfile.yml

@@ -8,7 +8,7 @@ vars:
   MOLECULE_DIR: '{{.ROOT_DIR}}/collections/ansible_collections/nullified/infrastructure/extensions'
 
 tasks:
-  venv:setup:
+  setup:venv:
     desc: install a Python3 virtualenv and all the required ansible / molecule dependencies.
     cmds:
       - |
@@ -19,6 +19,17 @@ tasks:
     status:
       - test -d venv
 
+  setup:ansible:
+    desc: install ansible galaxy collections
+    cmds:
+      - '{{.PYTHON_WRAPPER}} ansible-galaxy collection install -r ansible_galaxy-requirements.yml'
+
+  setup:
+    desc: set up environment for Python virtualenv and ansible dependencies
+    cmds:
+      - task: 'setup:venv'
+      - task: 'setup:ansible'
+
   test:modules:
     desc: run `ansible-test sanity` on collections to find common issues for modules and collections
     dir: collections/ansible_collections