feat: install atlas in mfe role

Download the openedx-atlas executable for all Micro-frontends to be used in `make pull_translations`

This installs `atlas` on all Ansible build targets such as Native Installation and Devstack.

This contribution is part of the [FC-0012 project](https://openedx.atlassian.net/l/cp/XGS0iCcQ) which is sparked by the [Translation Infrastructure update OEP-58](https://open-edx-proposals.readthedocs.io/en/latest/architectural-decisions/oep-0058-arch-translations-management.html#specification).

playbooks/roles/mfe/defaults/main.yml

@@ -17,6 +17,7 @@ MFE_NODE_MODULES_DIR: '{{ MFE_CODE_DIR }}/node_modules'
 MFE_NODE_BIN: '{{ MFE_NODE_MODULES_DIR }}/.bin'
 MFE_NODE_VERSION: '16.13.2'
 MFE_NPM_VERSION: '8.1.2'
+MFE_ATLAS_VERSION: 'v0.1.1'
 
 MFE_DEBIAN_PKGS_DEFAULT:
   - gettext

playbooks/roles/mfe/tasks/main.yml

@@ -66,6 +66,16 @@
     - install
     - install:system-requirements
 
+- name: install Open edX Atlas translation tool
+  get_url:
+    url: "https://github.com/openedx/openedx-atlas/releases/{{ MFE_ATLAS_VERSION }}/atlas"
+    # Even though Atlas is a bash script, it is installed in the nodeenv bin to avoid adding another PATH entry.
+    dest: "{{ MFE_NODEENV_BIN }}/atlas"
+  become_user: "{{ edx_django_service_user }}"
+  tags:
+    - install
+    - install:app-requirements
+
 - name: upgrade npm
   command: "npm install -g npm@{{ MFE_NPM_VERSION }}"
   become_user: "{{ MFE_USER }}"