concurrency: disallow lock flushing in production builds

This is an undocumented setting that is still under development. While
it is undocumented, this additional check will avoid any accidental
use.

Epic: none
Release note: None

Author: stevendanna

pkg/kv/kvserver/concurrency/concurrency_manager.go

@@ -24,6 +24,7 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/settings/cluster"
 	"github.com/cockroachdb/cockroach/pkg/storage"
 	"github.com/cockroachdb/cockroach/pkg/storage/enginepb"
+	"github.com/cockroachdb/cockroach/pkg/util/buildutil"
 	"github.com/cockroachdb/cockroach/pkg/util/debugutil"
 	"github.com/cockroachdb/cockroach/pkg/util/hlc"
 	"github.com/cockroachdb/cockroach/pkg/util/log"
@@ -132,15 +133,27 @@ var UnreplicatedLockReliabilityLeaseTransfer = settings.RegisterBoolSetting(
 	"kv.lock_table.unreplicated_lock_reliability.lease_transfer.enabled",
 	"whether the replica should attempt to keep unreplicated locks during lease transfers",
 	metamorphic.ConstantWithTestBool("kv.lock_table.unreplicated_lock_reliability.lease_transfer.enabled", false),
+	settings.WithValidateBool(func(_ *settings.Values, enabled bool) error {
+		if enabled && !buildutil.CrdbTestBuild {
+			return errors.Newf("kv.lock_table.unreplicated_lock_reliability.lease_transfer.enabled is not supported in production builds")
+		}
+		return nil
+	}),
 )
 
-// UnreplicatedLockReliabilityMerge controls whether the replica will
-// attempt to keep unreplicated locks during range merge operations.
+// UnreplicatedLockReliabilityMerge controls whether the replica will attempt to
+// keep unreplicated locks during range merge operations.
 var UnreplicatedLockReliabilityMerge = settings.RegisterBoolSetting(
 	settings.SystemOnly,
 	"kv.lock_table.unreplicated_lock_reliability.merge.enabled",
 	"whether the replica should attempt to keep unreplicated locks during range merges",
 	metamorphic.ConstantWithTestBool("kv.lock_table.unreplicated_lock_reliability.merge.enabled", false),
+	settings.WithValidateBool(func(_ *settings.Values, enabled bool) error {
+		if enabled && !buildutil.CrdbTestBuild {
+			return errors.Newf("kv.lock_table.unreplicated_lock_reliability.merge.enabled is not supported in production builds")
+		}
+		return nil
+	}),
 )
 
 var MaxLockFlushSize = settings.RegisterByteSizeSetting(