Vendure can not find collection by slug if 2 collection have the same slug in different channels.

[ttournie]

Describe the bug
Vendure can not find collection by slug if 2 collection have the same slug in different channels.

To Reproduce
Steps to reproduce the behavior:

1. Create a channel A
2. Create a channel B
3. in the channel A create a collection with slug 'test'
4. in the channel B create a collection with slug 'test'
5. try to get the channel by slug test in channel B (or A if channel B works). For this you can use the collection query

Expected behavior
It should return the right collection

Environment (please complete the following information):

• @vendure/core version: 2.0.6
• Nodejs version : 18.17
• Database (mysql/postgres etc): postgres

Additional context

After investigation, it’s because the first query in CollectionService findOneBySlug, is not contextualised with the channel, but the last query is.
So it gets all the collection matching the criteria → if severals it take the first of the list, then try to get the collection by ID on the channel, but because the selected item in the first query is not from the right channel it does not finds it.