(PC-34083)[API] fix: pro: draft offer: always check if EAN is used #10816

Job	Run time
Init job	40s
Tests API documentation	0s
Tests pro	0s
[pcapi] build docker image. / Build Docker image	2m 19s
[pcapi-console] build docker image. / Build Docker image	3m 38s
[pcapi-tests] build docker image. / Build Docker image	3m 49s
MyPy cop / MyPy cop test	33s
Merge Allure Reports and Push to Allure Repository	0s
Dependabot	0s
[PRO] Deploy PR version for validation with testing backend	0s
[PRO] Deploy PR version for validation pr preview backend / deploy_on_firebase	1m 28s
Tests pro E2E / E2E tests and notifications	10m 26s
Update api client template / Update API Client template	5m 11s
Tests api / Pylint	3m 46s
Tests api / Test database schema	2m 50s
Tests api / Pytest (tests/core/bookings tests/core/offers tests/core/finance)	5m 24s
Tests api / Quality checks	2m 44s
Tests api / Pytest (tests/core --ignore=tests/core/bookings --ignore=tests/core/offers --ignore=tests/core/fi...	5m 19s
Tests api / Pytest (tests/routes -m 'not backoffice')	7m 31s
Tests api / Pytest (tests --ignore=tests/core --ignore=tests/routes)	3m 8s
Tests api / Pytest (tests/routes/backoffice/collective_bookings_test.py tests/routes/backoffice/collective_of...	8m 54s
Tests api / Pytest (tests/routes/backoffice -m 'backoffice' --ignore=tests/routes/backoffice/collective_booki...	7m 40s
Push pcapi-console docker image to registry / Push Docker image	1m 31s
Push pcapi docker image to registry / Push Docker image	1m 35s
Deploy PullRequest to testing environment / Deploy pullrequest	51m 25s
	2h 9m 51s

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