fix(comptaction): use int64_t for parsing total_keys and deleted_keys (#3599)

# Summary 

When the number of total keys is above 2^31 the following error is
present in the logs

```
[E][compaction_checker.cc:87] [compaction checker] Parse total_keys error: out of range of integer type
``` 

Parsing as `int64_t` match `total_keys` and `deleted_keys` type.

Author: DanFaudemer

src/storage/compaction_checker.cc

@@ -82,15 +82,15 @@ void CompactionChecker::PickCompactionFilesForCf(const engine::ColumnFamilyConfi
 
     for (const auto &property_iter : iter.second->user_collected_properties) {
       if (property_iter.first == "total_keys") {
-        auto parse_result = ParseInt<int>(property_iter.second, 10);
+        auto parse_result = ParseInt<int64_t>(property_iter.second, 10);
         if (!parse_result) {
           ERROR("[compaction checker] Parse total_keys error: {}", parse_result.Msg());
           continue;
         }
         total_keys = *parse_result;
       }
       if (property_iter.first == "deleted_keys") {
-        auto parse_result = ParseInt<int>(property_iter.second, 10);
+        auto parse_result = ParseInt<int64_t>(property_iter.second, 10);
         if (!parse_result) {
           ERROR("[compaction checker] Parse deleted_keys error: {}", parse_result.Msg());
           continue;