Closes abandoned issues after a period of inactivity (#7225)

Signed-off-by: Nquicksilver <zhifeng.zhang@zilliz.com>

.github/stale.yml

+# Configuration for probot-stale - https://github.com/probot/stale
+
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 30
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - priority/critical-urgent
+  - priority/important-longterm
+# Label to use when marking an issue as stale
+staleLabel: do-not-merge/hold
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Thank you
+  for your contributions.
+
+  Rotten issues close after 30d of inactivity.
+  Reopen the issue with `/reopen`.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false
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