test(grow shrink): use one write command per loader + cleanup

test-cases/temp_90_percent/90-percent-perf-i4i-2xlarge-grow-shrink-dc.yaml

@@ -9,22 +9,24 @@ prepare_write_cmd: [
 
 stress_cmd_m: "cassandra-stress mixed no-warmup cl=QUORUM duration=800m -schema 'replication(strategy=NetworkTopologyStrategy,replication_factor=3)' -mode cql3 native -rate 'threads=300 fixed=16875/s' -col 'size=FIXED(128) n=FIXED(8)' -pop 'dist=gauss(1..600000000,300000000,6000000)'"
 
+
 n_db_nodes: 3
+instance_type_db: 'i4i.2xlarge'
+
 nemesis_add_node_cnt: 1
-n_loaders: 4
-n_monitor_nodes: 1
 nemesis_grow_shrink_instance_type: 'i4i.8xlarge'
 
+n_loaders: 4
 instance_type_loader: 'c6i.2xlarge'
+
+n_monitor_nodes: 1
 instance_type_monitor: 't3.large'
-instance_type_db: 'i4i.2xlarge'
 
 nemesis_class_name: 'GrowShrinkDatacenterNemesis'
 nemesis_interval: 30
-nemesis_sequence_sleep_between_ops: 30
+nemesis_sequence_sleep_between_ops: 10
 
 user_prefix: 'elasticity-test'
-space_node_threshold: 644245094
 ami_id_db_scylla_desc: 'VERSION_DESC'
 
 round_robin: true
@@ -34,11 +36,7 @@ print_kernel_callstack: true
 
 store_perf_results: true
 # email_recipients: ["[email protected]"]
-# use_prepared_loaders: true
 use_hdr_cs_histogram: true
 email_subject_postfix: 'elasticity test'
 nemesis_double_load_during_grow_shrink_duration: 0
 parallel_node_operations: false
-
-stress_image:
-  cassandra-stress: 'scylladb/cassandra-stress:3.17.0'