Support uniqness test defined several times

[kokorin]

This is a:

• bug fix PR with no breaking changes
• new functionality

Link to Issue

No reported issue

Description & motivation

Our team has 2 dbt_utils.unique_combination_of_columns tests defined for the same model. Column set is different.
Latest release reports this case as a failure:

-- is_empty_fct_missing_primary_key_tests_ --
| RESOURCE_NAME             | RESOURCE_TYPE | MODEL_TYPE | IS_PRIMARY_KEY_TESTED | NUMBER_OF_TESTS_ON_MODEL |
| ------------------------- | ------------- | ---------- | --------------------- | ------------------------ |
| stg_xxx_yy__model_name_xx | model         | staging    |                 False |                        2 |

Integration Test Screenshot

TO BE DONE

Checklist

• I have verified that these changes work locally on the following warehouses (Note: it's okay if you do not have access to all warehouses, this helps us understand what has been covered)
  • BigQuery
  • Postgres
  • Redshift
  • Snowflake
  • Databricks
  • DuckDB
  • Trino/Starburst
• I have updated the README.md (if applicable)
• I have added tests & descriptions to my models (and macros if applicable)

[kokorin]

Trino tests failed because of trino.exceptions.Http502Error: error 502: bad gateway

[b-per]

🥖