Provide environment to int tests (microsoft#846)

### Motivation and Context
So that they can run

### Description
Provide environment to int tests

### Contribution Checklist
- [ ] The code builds clean without any errors or warnings
- [ ] The PR follows the [Contribution
Guidelines](https://github.com/microsoft/chat-copilot/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/chat-copilot/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [ ] All unit tests pass, and I have added new tests where possible

.github/workflows/copilot-deploy-pipeline.yml

@@ -37,6 +37,7 @@ jobs:
     needs: int
     with:
       BACKEND_HOST: ${{needs.int.outputs.backend-host}}
+      ENVIRONMENT: int
 
   stable:
     needs: [int-tests, build-webapi, build-memorypipeline, build-plugins]