chore: Set DD_SERVICE Environment Variable for edxapp

Author: nadeemshahzad

playbooks/roles/edxapp/templates/edx/app/edxapp/cms.sh.j2

@@ -13,6 +13,7 @@ export DD_DJANGO_USE_HANDLER_RESOURCE_FORMAT=true
 export DD_GIT_COMMIT_SHA="{{ app_version }}"
 export DD_GIT_REPOSITORY_URL="{{ EDXAPP_REPOSITORY_GIT_URL }}"
 export DD_LOGS_INJECTION=true
+export DD_SERVICE="edx-edxapp-cms"
 # Copied from edx_django_service playbook for consistency; Datadog
 # trace debug logging issue doesn't actually affect edxapp for some
 # reason.

playbooks/roles/edxapp/templates/edx/app/edxapp/lms.sh.j2

@@ -13,6 +13,7 @@ export DD_DJANGO_USE_HANDLER_RESOURCE_FORMAT=true
 export DD_GIT_COMMIT_SHA="{{ app_version }}"
 export DD_GIT_REPOSITORY_URL="{{ EDXAPP_REPOSITORY_GIT_URL }}"
 export DD_LOGS_INJECTION=true
+export DD_SERVICE="edx-edxapp-lms"
 # Copied from edx_django_service playbook for consistency; Datadog
 # trace debug logging issue doesn't actually affect edxapp for some
 # reason.

playbooks/roles/edxapp/templates/edx/app/edxapp/worker.sh.j2

@@ -13,6 +13,7 @@ export DD_DJANGO_USE_LEGACY_RESOURCE_FORMAT=true
 export DD_GIT_COMMIT_SHA="{{ app_version }}"
 export DD_GIT_REPOSITORY_URL="{{ EDXAPP_REPOSITORY_GIT_URL }}"
 export DD_LOGS_INJECTION=true
+export DD_SERVICE="edx-edxapp-${SERVICE_VARIANT}-workers"
 # Copied from edx_django_service playbook for consistency; Datadog
 # trace debug logging issue doesn't actually affect edxapp for some
 # reason.