MDEV-31573: rocksdb.group_min_max test fails

Set the histogram_type to be DOUBLE_PREC_HB as
it originally was.

storage/rocksdb/mysql-test/rocksdb/include/group_min_max.inc

@@ -12,6 +12,10 @@
 
 --source include/default_optimizer_switch.inc
 
+set
+  @rgmm_hist_type=@@histogram_type,
+  histogram_type=double_prec_hb;
+
 --disable_warnings
 drop table if exists t1;
 --enable_warnings
@@ -1436,3 +1440,5 @@ SHOW SESSION STATUS LIKE 'Handler_read%';
 DROP TABLE t1;
 
 --echo # End of test for Bug#18109609
+
+set histogram_type=@rgmm_hist_type;

storage/rocksdb/mysql-test/rocksdb/r/group_min_max.result

 set @debug_tmp= @@debug_dbug;
 set global debug_dbug="+d,force_group_by";
+set
+@rgmm_hist_type=@@histogram_type,
+histogram_type=double_prec_hb;
 drop table if exists t1;
 create table t1 (
 a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(248) default ' '
@@ -3523,4 +3526,5 @@ Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 DROP TABLE t1;
 # End of test for Bug#18109609
+set histogram_type=@rgmm_hist_type;
 set global debug_dbug=@debug_tmp;