[BD-32] feat: Open edX Filters backport

[mariajgrimaldi]

Description

Backport filters that didn't make it to nutmeg release:

Add filter before certificate creation starts

(cherry picked from commit e8fa890)

Add cohort change filter before moving users from cohorts

(cherry picked from commit 465e5c0)

Add filter before certificate rendering process starts

(cherry picked from commit 7f974d1)

Add filter before course dashboard rendering process starts

(cherry picked from commit 895a649)

Add filter before course about rendering process starts

(cherry picked from commit ccfa0b4)

Integrate cohort assignment filter definition to cohort model

(cherry picked from commit ec69659)

Supporting information

Refer to the BTR wg github issue for the rationale behind this PR: openedx/wg-build-test-release#187

Testing instructions

1. Install the needed library release: openedx-filters==0.7.0
2. Install the samples library:
   pip install git+https://github.com/eduNEXT/openedx-filters-samples.git@master#egg=openedx_filters_samples
3. Then, configure each filter. If you want to test all the filters simultaneously, use this configuration and try to do each operation the filter is related to; the filter sample step will stop the operation.

OPEN_EDX_FILTERS_CONFIG = {
    "org.openedx.learning.certificate.creation.requested.v1": {
        "fail_silently": False,
        "pipeline": [
            "openedx_filters_samples.samples.pipeline.StopCertificateCreation"
        ]
    },
    "org.openedx.learning.cohort.change.requested.v1": {
        "fail_silently": False,
        "pipeline": [
            "openedx_filters_samples.samples.pipeline.StopCohortChange"
        ]
    },
    "org.openedx.learning.certificate.render.started.v1": {
        "fail_silently": False,
        "pipeline": [
            "openedx_filters_samples.samples.pipeline.RenderAlternativeCertificate",
        ]
    },
    "org.openedx.learning.dashboard.render.started.v1": {
        "fail_silently": False,
        "pipeline": [
            "openedx_filters_samples.samples.pipeline.RenderAlternativeDashboard",
        ]
    },
    "org.openedx.learning.course_about.render.started.v1": {
        "fail_silently": False,
        "pipeline": [
            "openedx_filters_samples.samples.pipeline.RenderAlternativeCourseAbout",
        ]
    },
    "org.openedx.learning.cohort.assignment.requested.v1": {
        "fail_silently": False,
        "pipeline": [
            "openedx_filters_samples.samples.pipeline.StopCohortAssignment"
        ]
    },
}

Please, for detailed instructions on how to test each filter, refer to each of these PR(s):

Filter for certificate creation:
#29949
Filter for cohort change:
#29964
Filter for certificate rendering:
#29976
Filter for dashboard rendering:
#29994
Filter for course about rendering:
#29996
Filter for cohort assignment:
#30431

Deadline

For the next nutmeg release.

[openedx-webhooks]

Thanks for the pull request, @mariajgrimaldi!

When this pull request is ready, tag your edX technical lead.

[BbrSofiane]

@openedx-community-bot merge

[openedx-webhooks]

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