Json array is transformed in map when removing empty elements

### Expected Behaviour
Json array stays as array when removing empty elements

### Actual Behaviour
Json array is transformed in map when removing empty elements

### Reproduce Scenario (including but not limited to)

#### Steps to Reproduce
Set examples/performance/perfRun.yaml to
```
name: "apiKey"
version: "1.0"
description: ""
engine: autocannon
type: perfRun
config:
url: https://api-gateway-qe-d-ue1.adobe.io/test
connections: 2000
duration: 30
method: GET
requests: # Array of objects.
- headers:
host: keepalive-with-upstream-test-stage-service-1.adobe.io
method:
path:
- headers:
host: baseline-performance-testing-stage-service-1.adobe.io
hooks:
onInit:
onDestroy:
onRequest:
```
and run athena

Start by reproducing the behavior with the configuration in examples/performance/perfRun.yaml and running athena. Trace how empty elements are removed from the requests array and where the resulting JSON value is transformed into a map. Done means the array remains an array after empty elements are removed, with the reproduction covered by a regression test if the project provides a suitable test location.

Written by the indexing model from the issue text.