Suppress "deployed to test-trigger-is" items on the PR timeline

The test-trigger-is environment exists only to gate the secrets used to
trigger integration tests, not to track a real deployment. Referencing it
made every PR and merge-group run post a "deployed to test-trigger-is"
item on the pull request timeline.

Set deployment: false so the jobs still get the environment's secrets and
protection rules but no deployment object is created.

Co-authored-by: Isaac

Author: pietern

.github/workflows/push.yml

@@ -461,7 +461,13 @@ jobs:
       checks: write
       contents: read
 
-    environment: "test-trigger-is"
+    # Use the environment only to gate its secrets; skip creating a deployment
+    # object so these runs don't post "deployed to test-trigger-is" items on the
+    # pull request timeline. See:
+    # https://docs.github.com/en/actions/how-tos/deploy/configure-and-manage-deployments/control-deployments#using-environments-without-deployments
+    environment:
+      name: "test-trigger-is"
+      deployment: false
 
     steps:
       - name: Generate GitHub App Token (check runs)
@@ -536,7 +542,13 @@ jobs:
     permissions:
       contents: read
 
-    environment: "test-trigger-is"
+    # Use the environment only to gate its secrets; skip creating a deployment
+    # object so these runs don't post "deployed to test-trigger-is" items on the
+    # pull request timeline. See:
+    # https://docs.github.com/en/actions/how-tos/deploy/configure-and-manage-deployments/control-deployments#using-environments-without-deployments
+    environment:
+      name: "test-trigger-is"
+      deployment: false
 
     steps:
       - name: Generate GitHub App Token

.github/workflows/start-integration-tests.yml

@@ -13,7 +13,13 @@ jobs:
       group: databricks-deco-testing-runner-group
       labels: ubuntu-latest-deco
 
-    environment: "test-trigger-is"
+    # Use the environment only to gate its secrets; skip creating a deployment
+    # object so these runs don't post "deployed to test-trigger-is" items on the
+    # pull request timeline. See:
+    # https://docs.github.com/en/actions/how-tos/deploy/configure-and-manage-deployments/control-deployments#using-environments-without-deployments
+    environment:
+      name: "test-trigger-is"
+      deployment: false
 
     steps:
       - name: Generate GitHub App Token for Workflow Trigger