Add ECS E2E test into main build (#259)

*Description of changes:*
Add ECS E2E test entry point into main build.

An example of succeed test workflow:

https://github.com/aws-observability/aws-otel-python-instrumentation/actions/runs/10926973971/job/30332749849

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Author: zzhlogin

.github/workflows/application-signals-e2e-test.yml

@@ -76,5 +76,13 @@ jobs:
       adot-image-name: ${{ inputs.adot-image-name }}
       caller-workflow-name: 'main-build'
 
+  python-ecs-e2e-test:
+    uses: aws-observability/aws-application-signals-test-framework/.github/workflows/python-ecs-test.yml@main
+    secrets: inherit
+    with:
+      aws-region: us-east-1
+      adot-image-name: ${{ inputs.adot-image-name }}
+      caller-workflow-name: 'main-build'
+