Create Partner Shared Connection
Shares a connection with another organization in the caller's partner account.
The parent connection must belong to the partner owner organization, and the
target child organization must belong to that same partner. The endpoint does
not share arbitrary connections across unrelated organizations.
If you need to check whether a shared copy already exists before creating one,
call
[`GET /api/organizations/{org_id}/connections/{connection_id}/shared`](../../../../../../api-reference/connections/list-shared-connections-for-partner)
first.
