asim: clean up generated folder for rebalancing

This commit regenerates the rebalancing_qps generated files and removes
outdated generated data.

Author: wenyihu6

pkg/kv/kvserver/asim/tests/testdata/generated/.gitignore

@@ -6,7 +6,7 @@
 # Except this specific directory (relative to .gitignore)
 # Note that this intentionally does not include subdirectories (such as traces)
 # which are not deterministic.
-!sma/rebalancing/**
+!sma/rebalancing_qps/**
 **/traces
 # And the readme file.
 !README.md

pkg/kv/kvserver/asim/tests/testdata/generated/sma/rebalancing/rebalancing_sma-count_1.json

@@ -9,6 +9,7 @@ Cluster Set Up
 Key Space
 	[0,10000): 7(rf=3), 0MiB, [s1:(7,4*),s2:(6,2*),s3:(3,0*),s4:(2,0*),s5:(1,0*),s6:(1,1*),s7:(1,0*)]
 Event
+	set LBRebalancingObjective to 0
 	set LBRebalancingMode to 2
 Workload Set Up
 	[0,10000): 95%r large-block [128-256B/op, 7000ops/s]