Revert "Reduce benchmark params count so it can be run (#1319)"

This reverts commit 543b859.

Author: kunga

ydb/core/tablet_flat/benchmark/b_part_index.cpp

@@ -76,6 +76,8 @@ namespace {
             UNIT_ASSERT_GE(part->Stat.Bytes, 100ull*1024*1024);
             UNIT_ASSERT_LE(part->Stat.Bytes, 100ull*1024*1024 + 10ull*1024*1024);
 
+            UNIT_ASSERT_VALUES_EQUAL(part->Slices->size(), 1);
+
             GroupId = TGroupId(groups ? 1 : 0);
         }
 
@@ -240,10 +242,10 @@ BENCHMARK_REGISTER_F(TPartIndexSeekFixture, SeekKey)
 BENCHMARK_REGISTER_F(TPartIndexIteratorFixture, DoReads)
     ->ArgsProduct({
         /* b-tree */ {0, 1},
-        /* groups: */ {1},
-        /* history: */ {1},
-        /* reverse: */ {0},
-        /* ESeek: */ {1},
+        /* groups: */ {0, 1},
+        /* history: */ {0, 1},
+        /* reverse: */ {0, 1},
+        /* ESeek: */ {1, 2, 3},
         /* items */ {1, 10, 100}})
     ->Unit(benchmark::kMicrosecond);