Fix split budget for multi configuration in Utility Analysis

[dvadym]

What was broken?

For simplicity assume that metrics=[count, sum] and there are 2 configurations to compute - max_partition_contributed = [1,2].

For computing each metric for each input configuration UtilityAnalysisCombiner is created, before this PR the code was the following

for metric in metrics:
  for configuration in configurations:
      budget = request_budget()
      // create  combiner

The problem is that it requests budget 2*2 = 4 times. Which is incorrect, since different configurations have different budget. This PR fixes that by ensuring that for each metric independently of the number of configurations request_budget is called once.

[dvadym]

Thanks for review!