Fix label template on project creation

What does this MR do and why?

Labels were failing to be created silently because the new label cannot have an organization_id value. organization_id was introduced in Labels sharding_key handles template labels (!198202 - merged) recently, and with it, a new validation that makes sure that no organization_id is present on project labels.

This change also fixes the specs to make sure the project is created successfully when template labels are created.

How to set up and validate locally

1. Go to the labels section of the admin section in your GDK
2. Create a few labels in there
3. Create a new project. The new project should have the labels you created in step 2 after this change. Before this change no error would be raised, but the labels would not be created

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