Add a dagster/job_name tag to ECS run launcher tasks (#23364)

Summary:
Resolves #14939.

## Summary & Motivation

## How I Tested These Changes

python_modules/libraries/dagster-aws/dagster_aws/ecs/launcher.py

@@ -346,7 +346,11 @@ def build_ecs_tags_for_run_task(self, run, container_context: EcsContainerContex
         if any(tag["key"] == "dagster/run_id" for tag in container_context.run_ecs_tags):
             raise Exception("Cannot override system ECS tag: dagster/run_id")
 
-        return [{"key": "dagster/run_id", "value": run.run_id}, *container_context.run_ecs_tags]
+        return [
+            {"key": "dagster/run_id", "value": run.run_id},
+            {"key": "dagster/job_name", "value": run.job_name},
+            *container_context.run_ecs_tags,
+        ]
 
     def _get_run_tags(self, run_id):
         run = self._instance.get_run_by_id(run_id)

python_modules/libraries/dagster-aws/dagster_aws_tests/ecs_tests/launcher_tests/test_launching.py

@@ -88,6 +88,11 @@ def test_default_launcher(
         )
         assert ecs.list_tags_for_resource(resourceArn=task_arn)["tags"][0]["value"] == run.run_id
 
+        assert (
+            ecs.list_tags_for_resource(resourceArn=task_arn)["tags"][1]["key"] == "dagster/job_name"
+        )
+        assert ecs.list_tags_for_resource(resourceArn=task_arn)["tags"][1]["value"] == run.job_name
+
     # We set job-specific overides
     overrides = task["overrides"]["containerOverrides"]
     assert len(overrides) == 1