POLIO-1722 add endpoint to refresh OpenHexa VRF data

[quang-le]

PowerBi can't refresh data handled by OpenHexa pipelines so we need an endpoint in iaso to handle that

Related JIRA tickets : IA-XXX, WC2-XXX, POLIO-1722

Self proofreading checklist

• Did I use eslint and black formatters
• Is my code clear enough and well documented
• [] Are my typescript files well typed
• New translations have been added or updated if new strings have been introduced in the frontend
• My migrations file are included
• Are there enough tests
• Documentation has been included (for new feature)

Doc

NA

Changes

• Add an endpoint using ExternalTaskViewset
• Override list method to behave like POST, because powerBI can't POST

How to test

• Login to OpenHexa's polio workspace
• Deploy the branch on staging
• go to api/polio/tasks/refreshvrf/:
  • A new task should be visible in the tasks list
  • In openHexa, the pipeline should have run, with the task id ans "staging" as parameters
  • in OpenHExa, the DB table VaccineRequestFormsStaging should have been updated

Print screen / video

Notes

Once the PR is merged, there are additional steps to perform to switch to prod:

• Update the powerBI dashboard so that the refresh button attacks the new API. Make a copy of the dashbaord that points to staging data first
• Then:
  • Add the vrf-pipeline-configto prod. It can be copied from staging, with just thetarget` adpated.
  • Update the prod dashboard
  • Delete the old Jupyter notebook, since the code now lives on github

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fix: empty instance pop up

Refs: IA-3665

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