Support multiple entries of source + target + map_to_list_when condition in map_to_list processor

Is your feature request related to a problem? Please describe.
Allow the map_to_list processor to convert multiple sources (map of key-value pairs) to lists of objects under different map_to_list_when conditions.

Describe the solution you'd like
Modify map_to_list processor to support this new configuration that allows multiple entries of source, target and map_to_list_when(optional) like shown below. The existing configuration is still supported. This is new config under entries needs to be added.

processor:
    - map_to_list:
        entries:
           - source: "my-map"
             target: "my-list"
             map_to_list_when: "some-key == 'test'"
           - source: "my-map2"
             target: "my-list2"
             map_to_list_when: "some-key2 == 'test2'"

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Additional context
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