test(gradual): add pipeline for gradual test with tablets

Add Jenkins pipeline for predefined throughput steps test with tablets

jenkins-pipelines/performance/branch-perf-v16/scylla-enterprise/perf-regression/scylla-enterprise-perf-regression-predefined-throughput-steps-tablets.jenkinsfile

@@ -0,0 +1,12 @@
+#!groovy
+
+// trick from https://github.com/jenkinsci/workflow-cps-global-lib-plugin/pull/43
+def lib = library identifier: 'sct@snapshot', retriever: legacySCM(scm)
+
+perfRegressionParallelPipeline(
+    backend: "aws",
+    aws_region: "us-east-1",
+    test_name: "performance_regression_gradual_grow_throughput.PerformanceRegressionPredefinedStepsTest",
+    test_config: '''["test-cases/performance/perf-regression-predefined-throughput-steps.yaml", "configurations/performance/cassandra_stress_gradual_load_steps_enterprise.yaml", "configurations/disable_kms.yaml", "configurations/disable_speculative_retry.yaml"]''',
+    sub_tests: ["test_write_gradual_increase_load", "test_read_gradual_increase_load", "test_mixed_gradual_increase_load"],
+)