[POC] feat: add filters for roles management (1st approach)

[mariajgrimaldi]

Description

This PR adds filters aimed to be used for roles management in the main openedx services. Here's is an example of how they can be used:

They might be triggered by: https://github.com/openedx/edx-platform/compare/master...MJG/roles-refactor-by-filters

And with the following pipeline steps, we can add an additional role implemented in a plugin: https://github.com/mariajgrimaldi/platform-plugin-sample/commit/13a20ac6b4a60b2773734187dd7c8937228a167a

Configured using this Django setting:

OPEN_EDX_FILTERS_CONFIG = {
    "org.openedx.learning.instructor.dashboard.render.started.v1": {
        "fail_silently": False,
        "pipeline": [
            "platform_plugin_sample.extensions.filters.CheckProfessorRole",
        ]
    },

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[mphilbrick211]

Hi @mariajgrimaldi! Just checking in to see if this is still needed?

[mariajgrimaldi]

@mphilbrick211: thanks for the reminder! I'll close this for the time being