[FEATURE] Workloads should be updated to use Jinja2 macros

[gkamat]

Description

The OSB workloads have a set of test procedures that are quite repetitive:

        {
          "operation": "large_filtered_terms",
          "warmup-iterations": 200,
          "iterations": 100,
          "target-throughput": 1.1
        },
        {
          "operation": "large_prohibited_terms",
          "warmup-iterations": 200,
          "iterations": 100,
          "target-throughput": 1.1
        },
        {
          "operation": "desc_sort_population",
          "warmup-iterations": 200,
          "iterations": 100,
          "target-throughput": 1.5
        },

These can be made more concise by using the Jinja2 macro feature judiciously, so that the repetition is reduced. This will help especially when the items become more complex, after the addition of per-operation target throughput and number of clients.