ci: add S3 mutation regression coverage (#8804)

* test/s3: stabilize distributed lock regression

* ci: add S3 mutation regression workflow

* test: fix delete regression readiness probe

* test: address mutation regression review comments

test/s3/delete/test_s3.json

@@ -0,0 +1,20 @@
+{
+  "identities": [
+    {
+      "name": "admin",
+      "credentials": [
+        {
+          "accessKey": "admin",
+          "secretKey": "admin"
+        }
+      ],
+      "actions": [
+        "Admin",
+        "Read",
+        "List",
+        "Tagging",
+        "Write"
+      ]
+    }
+  ]
+}