Add failed filter to /codes

[dsubak]

What are the relevant tickets?

https://github.com/mitodl/hq/issues/12722

Description (What does it do?)

Adds a new status filter value. This value allows callers to filter down to records which are unredeemed and have received a permanent failure status event from mailgun.

How can this be tested?

• Create a b2b contract w/ one or more codes and set yourself as a manager of the corresponding organization.
• Preassign a least one code. Find the DiscountContractAttachmentRedemption for this code.
• Run ./manage.py b2b_send_mailgun_webhook <record_id> failed --host='http://<local_mitxonline_host>:<port>'
• Visit /api/schema/swagger-ui/#/b2b/b2b_manager_organizations_contracts_codes_list and specify your contract and status=failed as args. You should only get the record you just recorded a webhook for.

[github-actions]

OpenAPI Changes

Show/hide changes

## Changes for v0.yaml:
1 changes: 0 error, 0 warning, 1 info
info	[request-parameter-enum-value-added] at head/openapi/specs/v0.yaml
	in API GET /api/v0/b2b/manager/organizations/{parent_lookup_organization}/contracts/{id}/codes/
		added the new enum value `failed` to the `query` request parameter `status`



## Changes for v1.yaml:
1 changes: 0 error, 0 warning, 1 info
info	[request-parameter-enum-value-added] at head/openapi/specs/v1.yaml
	in API GET /api/v0/b2b/manager/organizations/{parent_lookup_organization}/contracts/{id}/codes/
		added the new enum value `failed` to the `query` request parameter `status`



## Changes for v2.yaml:
1 changes: 0 error, 0 warning, 1 info
info	[request-parameter-enum-value-added] at head/openapi/specs/v2.yaml
	in API GET /api/v0/b2b/manager/organizations/{parent_lookup_organization}/contracts/{id}/codes/
		added the new enum value `failed` to the `query` request parameter `status`

Unexpected changes? Ensure your branch is up-to-date with main (consider rebasing).

[daniellefrappier18]

LGTM