Cap file size for snapshot data files (#7182)

* save limit deserialize

* save

* Save

* Clean up

* rustfmt

* rustfmt

* Just comment out to please CI

* Fix ci...

* Move code

* Rustfmt

* Crean up control flow

* Add another comment

* Introduce predetermined constant limit on snapshot data files (deserialize side)

* Introduce predetermined constant limit on snapshot data files (serialize side)

* rustfmt

* Tweak message

* Revert dynamic memory limit

* Limit size of snapshot data file (de)serialization

* Fix test breakage

* Clean up

* Fix uses formatting

* Rename: deserialize_{for,from}_snapshot

* Simplify comment

* Use Slot

* Provide slot for status cache

* Align variable name with snapshot_status_cache_file_path

* Define serialize_snapshot_data_file_with_metrics

* Fix build.......

* De-marco serialize_snapshot_data_file_with_metrics

* Revert u64 => Slot

metrics/scripts/grafana-provisioning/dashboards/testnet-monitor.json

@@ -5803,7 +5803,7 @@
           "measurement": "cluster_info-vote-count",
           "orderByTime": "ASC",
           "policy": "autogen",
-          "query": "SELECT mean(\"count\")  AS \"serialize_bank_rc\" FROM \"$testnet\".\"autogen\".\"bank-rc-serialize-ms\" WHERE host_id::tag =~ /$hostid/ AND $timeFilter GROUP BY time($__interval)",
+          "query": "SELECT mean(\"count\")  AS \"serialize_bank\" FROM \"$testnet\".\"autogen\".\"bank-serialize-ms\" WHERE host_id::tag =~ /$hostid/ AND $timeFilter GROUP BY time($__interval)",
           "rawQuery": true,
           "refId": "C",
           "resultFormat": "time_series",
@@ -9510,6 +9510,82 @@
             ]
           ],
           "tags": []
+        },
+        {
+          "groupBy": [
+            {
+              "params": [
+                "$__interval"
+              ],
+              "type": "time"
+            },
+            {
+              "params": [
+                "null"
+              ],
+              "type": "fill"
+            }
+          ],
+          "hide": false,
+          "orderByTime": "ASC",
+          "policy": "default",
+          "query": "SELECT MAX(\"size\")  FROM \"$testnet\".\"autogen\".\"snapshot-bank-file\" WHERE $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "refId": "D",
+          "resultFormat": "time_series",
+          "select": [
+            [
+              {
+                "params": [
+                  "value"
+                ],
+                "type": "field"
+              },
+              {
+                "params": [],
+                "type": "mean"
+              }
+            ]
+          ],
+          "tags": []
+        },
+        {
+          "groupBy": [
+            {
+              "params": [
+                "$__interval"
+              ],
+              "type": "time"
+            },
+            {
+              "params": [
+                "null"
+              ],
+              "type": "fill"
+            }
+          ],
+          "hide": false,
+          "orderByTime": "ASC",
+          "policy": "default",
+          "query": "SELECT MAX(\"size\")  FROM \"$testnet\".\"autogen\".\"snapshot-status-cache-file\" WHERE $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "refId": "E",
+          "resultFormat": "time_series",
+          "select": [
+            [
+              {
+                "params": [
+                  "value"
+                ],
+                "type": "field"
+              },
+              {
+                "params": [],
+                "type": "mean"
+              }
+            ]
+          ],
+          "tags": []
         }
       ],
       "thresholds": [],