feat: create a new setting USE_DISCUSSIONS_MFE

[luisfelipec95]

Description

This PR adds a new setting USE_DISCUSSIONS_MFE that will allow Discussions MFE to be enabled or disabled in the tenant

Supporting information

JIRA Issue DS-806

Testing instructions

1. Run a Palm environment using TVM or the Tutor docs in its Palm version
2. Use this branch as your edx-platform version adding in the config.yml the following

EDX_PLATFORM_REPOSITORY: https://github.com/eduNEXT/edunext-platform.git
EDX_PLATFORM_VERSION: lfc/enable-discussions-mfe

3. Install tutor-mfe directly in the Tutor environment tutor plugins install mfe, and enable it tutor plugins enable mfe
4. tutor plugins install forum
5. Update the environment settings tutor config save
6. tutor dev launch
7. Go to both container tutor dev exec lms/cms bash, install eox-tenant pip install eox-tenant, and run the migrations ./manage.py lms makemigrations and ./manage.py lms migrate
8. Restart the containers tutor dev restart
9. Go to the admin panel and create 2 new routes:

• Domain name: site1.local.overhang.io

  {
      "DISCUSSIONS_MICROFRONTEND_URL": "http://site1.local.overhang.io:2002/discussions",
      "EDNX_USE_SIGNAL": true,
      "LEARNING_MICROFRONTEND_URL": "http://site1.local.overhang.io:2000/learning",
      "LMS_BASE": "site1.local.overhang.io:8000",
      "LMS_ROOT_URL": "http://site1.local.overhang.io:8000",
      "MFE_CONFIG": {
          "EXAMS_BASE_URL": "",
          "LMS_BASE_URL": "http://site1.local.overhang.io",
          "LOGIN_URL": "http://site1.local.overhang.io/login",
          "LOGOUT_URL": "http://site1.local.overhang.io/logout"
      },
      "PLATFORM_NAME": "site1",
      "SITE_NAME": "site1.local.overhang.io",
      "USE_DISCUSSIONS_MFE": false,
      "course_org_filter": [
          "site1"
      ]
  }

• Domain name: site2.local.overhang.io

  {
      "DISCUSSIONS_MICROFRONTEND_URL": "http://site2.local.overhang.io:2002/discussions",
      "EDNX_USE_SIGNAL": true,
      "LEARNING_MICROFRONTEND_URL": "http://site2.local.overhang.io:2000/learning",
      "LMS_BASE": "site2.local.overhang.io:8000",
      "LMS_ROOT_URL": "http://site2.local.overhang.io:8000",
      "MFE_CONFIG": {
          "EXAMS_BASE_URL": "",
          "LMS_BASE_URL": "http://site2.local.overhang.io",
          "LOGIN_URL": "http://site2.local.overhang.io/login",
          "LOGOUT_URL": "http://site2.local.overhang.io/logout"
      },
      "PLATFORM_NAME": "site2",
      "SITE_NAME": "site2.local.overhang.io",
      "USE_DISCUSSIONS_MFE": true,
      "course_org_filter": [
          "site2"
      ]
  }

10. Go to Studio and create two new courses one of them with the organization site1 and the other one with the organization site2
11. Go to http://site1.local.overhang.io:8000/dashboard and clic on "Resume Course"
12. Install CORS Everywhere Extension to prevent CORS error.
13. Clic on "Discussions" Tab
14. If USE_DISCUSSIONS_MFE: true:
    
15. If USE_DISCUSSIONS_MFE: false:
    

[bra-i-am]

Additionally, before approving the PR, I would like to see the changes in amberes first because, according to my experience, there may be different settings that can change the way the code is executed, and it would be great to ensure the proper functioning

[bra-i-am]

I've been testing the MFE in the amberes environment and I don't know if it is even a problem, but when the flag is turned from true to false, the MFE lasts some minutes being disabled; despite the time it takes, everything works as expected.

[MaferMazu]

This looks good to me. I only have one suggestion: change the variable name USE_DISCUSSIONS_MFE_FRONTEND in the PR name or when you squash the commit because it is not consistent with the code.
Remember to add the documentation about how to enable or disable this here: https://docs.google.com/document/d/1j_kyDTdDaS1jnXgK0zbJOdz1XJja5lXvBzye8dmUhYA/edit?usp=sharing

[luisfelipec95]

This looks good to me. I only have one suggestion: change the variable name USE_DISCUSSIONS_MFE_FRONTEND in the PR name or when you squash the commit because it is not consistent with the code. Remember to add the documentation about how to enable or disable this here: https://docs.google.com/document/d/1j_kyDTdDaS1jnXgK0zbJOdz1XJja5lXvBzye8dmUhYA/edit?usp=sharing

Thanks!!