feat: Add Atlas pull_translations after Makefile fixes

This reverts commit 70eb142
and makes the following changes:

- No need to install atlas directly -- the openedx-atlas package
  actually has what we need already.
- After openedx/edx-platform#34306 we
  shouldn't encounter npm issues, so move task above NPM installs.
- Try dropping the DSM and CFG vars and see if it still works.

playbooks/roles/edxapp/tasks/deploy.yml

@@ -246,6 +246,18 @@
     - install
     - install:app-requirements
 
+- name: "Pull translations using Atlas after Python dependencies installed"
+  shell: |
+    set -eu -o pipefail
+    source {{ edxapp_venv_dir }}/bin/activate
+    OPENEDX_ATLAS_PULL=true make pull_translations
+  args:
+    executable: /usr/bin/bash
+    chdir: "{{ edxapp_code_dir }}"
+  become_user: "{{ edxapp_user }}"
+  tags:
+    - install
+
 # Set the npm registry
 # This needs to be done as root since npm is weird about
 # chown - https://github.com/npm/npm/issues/3565