[Backport 2.19] Add ml-commons passthrough post process function

[q-andy]

Backport a9151f4 from #4111

Test predict on local:

{
	"inference_results": [
		{
			"output": [
				{
					"name": "output",
					"dataAsMap": {
						"response": [
							{
								"jul": 0.43232125,
								"01": 0.042682294,
								"olympiad": 0.53324103
							}
						]
					}
				},
				{
					"name": "output",
					"dataAsMap": {
						"response": [
							{
								"hesse": 0.07568395,
								"greeting": 0.296827
							}
						]
					}
				}
			],
			"status_code": 200
		}
	]
}