Merged PR 5538: Fixed tests from resolutions

# Description

Removed tests for non mandatory fields

# Checklist

- [x] The edited models and dependants run properly with production data.
- [x] The edited models are sufficiently documented.
- [x] The edited models contain PK tests, and I've ran and passed them.
- [ ] I have checked for DRY opportunities with other models and docs.
- [ ] I've picked the right materialization for the affected models.

# Other

- [ ] Check if a full-refresh is required after this PR is merged.

Fixed tests from resolutions

Related work items: #31122

models/staging/resolutions/schema.yml

@@ -66,7 +66,6 @@ models:
         data_type: text
         description: "Unique Id that identifies the host."
         data_tests:
-          - not_null
           - relationships:
               to: ref('stg_core__user')
               field: id_user
@@ -78,8 +77,6 @@ models:
       - name: host_email
         data_type: text
         description: "Email of the host."
-        data_tests:
-          - not_null
 
       - name: host_last_name
         data_type: text