Simplify the PR checklist in relation to testing (#907)

.github/pull_request_template.md

@@ -15,11 +15,7 @@ Describe your changes, and why you're making them.
 
 ## Checklist
 - [ ] This code is associated with an Issue which has been triaged and [accepted for development](https://docs.getdbt.com/docs/contributing/oss-expectations#pull-requests). 
-- [ ] 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
 - [ ] I have read [the contributing guide](https://github.com/dbt-labs/dbt-utils/blob/main/CONTRIBUTING.md) and understand what's expected of me
+- [ ] I have run this code in development and it appears to resolve the stated issue
+- [ ] This PR includes tests, or tests are not required/relevant for this PR
 - [ ] I have updated the README.md (if applicable)
-- [ ] I have added tests & descriptions to my models (and macros if applicable)