Fix CloudFormation cross-region changeset approval

**Why?**

With the CloudFormation deployment provider: It would fail to create the
pipeline if one were to set the `change_set_approval` property to `True`,
while the pipeline lives in another region than where it is asked to deploy to.

**What?**

* The approval action should be performed in the region that hosts the
  pipeline. Not the target region.

src/lambda_codebase/initial_commit/bootstrap_repository/adf-build/shared/cdk/cdk_constructs/adf_cloudformation.py

@@ -43,7 +43,7 @@ def generate_actions(targets, region, map_params, target_approval_mode):
                         name=f"{target['name']}-{region}",
                         provider="Manual",
                         category="Approval",
-                        region=region,
+                        region=ADF_DEPLOYMENT_REGION,
                         target=target,
                         run_order=2,
                         map_params=map_params,