ci: add label condition to integration-test-deployment.yml (#35708)

### Reason for this change

The new integ test deployment workflow asks for a deployment in the UI. This has been confusing for contributors as it is similarly named to the general integ test available today.

### Description of changes

- Skip this job if the label `request-deployment-integ-run`
- Update name of the job to clarify its purpose

### Describe any new or updated permissions being added

No new permissions added.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: Abogical

.github/workflows/integration-test-deployment.yml

@@ -21,6 +21,8 @@ jobs:
   integration_test_deployment:
     runs-on: codebuild-aws-cdk-github-actions-deployment-integ-runner-${{ github.run_id }}-${{ github.run_attempt }}
     environment: deployment-integ-test # Do not change or remove this without discussing with Appsec
+    if: contains(github.event.pull_request.labels.*.name, 'pr/needs-integration-tests-deployment ')
+    name: 'Deploy integration test snapshots (requires `pr/needs-integration-tests-deployment` label)'
 
     env:
       PR_BUILD: true