Disable double accelerates on HDD by default (#17667) (#18295)

Author: serbel324

ydb/core/protos/config.proto

@@ -1535,7 +1535,7 @@ message TImmediateControlsConfig {
             Description: "Maximum number of slow disks, which DSProxy can skip with Accelerations, option for HDD",
             MinValue: 1,
             MaxValue: 2,
-            DefaultValue: 2 }];
+            DefaultValue: 1 }];
 
         optional uint64 SlowDiskThresholdSSD = 9 [(ControlOptions) = {
             Description: "The minimum ratio of slowest and second slowest disks, required to accelerate, promille, option for SSD",