Hack BP mocks to app dev against manually created dev store

[grollest]

Part of https://github.com/shop/issues-develop/issues/21570

BUG: When the app is created api_clients.application_developer_id is set to null

[github-actions[bot]]

We detected some changes at packages/*/src and there are no updates in the .changeset. If the changes are user-facing, run pnpm changeset add to track your changes and include them in the next release CHANGELOG.

[!CAUTION] DO NOT create changesets for features which you do not wish to be included in the public changelog of the next CLI release.

[github-actions[bot]]

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