MB-54516: Fix history_retention_bytes parsing

We should be parsing this value using stoull, not stoul, as longs are
32-bit on 64-bit Windows.

Change-Id: Ia4302bdcc74964baaa0b9c7fbaac96469c37de79
Reviewed-on: https://review.couchbase.org/c/kv_engine/+/185029
Well-Formed: Restriction Checker
Tested-by: Jim Walker <[email protected]>
Reviewed-by: Jim Walker <[email protected]>

Author: veselink1

engines/ep/src/ep_engine.cc

@@ -850,7 +850,7 @@ cb::engine_errc EventuallyPersistentEngine::setFlushParam(
         } else if (key == "history_retention_seconds") {
             configuration.setHistoryRetentionSeconds(std::stoul(val));
         } else if (key == "history_retention_bytes") {
-            configuration.setHistoryRetentionBytes(std::stoul(val));
+            configuration.setHistoryRetentionBytes(std::stoull(val));
         } else {
             msg = "Unknown config param";
             rv = cb::engine_errc::invalid_arguments;