Add autocut label for autocut issues (opensearch-project#7108)

Signed-off-by: Kunal Kotwani <kkotwani@amazon.com>

.github/ISSUE_TEMPLATE/failed_check.md

@@ -1,6 +1,6 @@
 ---
 title: '[AUTOCUT] Gradle Check Failure on push to {{ env.branch_name }}'
-labels: '>test-failure, bug'
+labels: '>test-failure, bug, autocut'
 ---
 
 Gradle check has failed on push of your commit {{ env.pr_from_sha }}.