[Feature](Recycler) Batch delete optimization for versioned tablet recycling (#59247)

### What problem does this PR solve?

Issue Number: close #xxx

Related PR: #xxx

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Author: Yukang-Lian

cloud/src/common/bvars.cpp

@@ -180,6 +180,11 @@ BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_bytes_object_deleted(
 BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_rowset_scanned_num(
         "recycler", "packed_file_rowset_scanned_num");
 
+BvarStatusWithTag<int64_t> g_bvar_recycler_batch_delete_rowset_plan_count(
+        "recycler", "batch_delete_rowset_plan_count");
+BvarStatusWithTag<int64_t> g_bvar_recycler_batch_delete_failures(
+        "recycler", "batch_delete_failures");
+
 // txn_kv's bvars
 bvar::LatencyRecorder g_bvar_txn_kv_get("txn_kv", "get");
 bvar::LatencyRecorder g_bvar_txn_kv_range_get("txn_kv", "range_get");

cloud/src/common/bvars.h

@@ -666,6 +666,9 @@ extern BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_recycle_cost_ms;
 extern BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_scanned_kv_num;
 extern BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_corrected_kv_num;
 extern BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_recycled_object_num;
+
+extern BvarStatusWithTag<int64_t> g_bvar_recycler_batch_delete_rowset_plan_count;
+extern BvarStatusWithTag<int64_t> g_bvar_recycler_batch_delete_failures;
 extern BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_bytes_object_deleted;
 extern BvarStatusWithTag<int64_t> g_bvar_recycler_packed_file_rowset_scanned_num;