feature/enable-null-urls

[fivetran-catfritz]

Are you a current Fivetran customer?

Fivetran created PR. What change(s) does this PR introduce?

• For use in the dbt_ad_reporting package, users can now allow records having nulls in url fields to be included in the ad_reporting__url_report model.
• Disabled the not_null test for pinterest_ads__url_report when null urls are allowed

Did you update the CHANGELOG?

• [x] Yes

Does this PR introduce a breaking change?

• [ ] Yes (please provide breaking change details below.)
• [x] No (please provide an explanation as to how the change is non-breaking below.)

Did you update the dbt_project.yml files with the version upgrade (please leverage standard semantic versioning)? (In both your main project and integration_tests)

• [x] Yes

Is this PR in response to a previously created Bug or Feature Request

• [x] Yes, Issue/Feature #59
• [ ] No

How did you test the PR changes?

• [x] BuildKite
• [x] Local (please provide additional testing details below)

Select which warehouse(s) were used to test the PR

• [x] BigQuery
• [x] Redshift
• [x] Snowflake
• [x] Postgres
• [x] Databricks
• [ ] Other (provide details below)

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[fivetran-sheringuyen]

I am going to merge this even though it is still failing databricks. It's the same issue we have been seeing in Google Ads and I believe once that is resolved, this will pass. Oddly, removing it from integration testing is still not completely solving the problem.