use many config files

[DmitryRomanov]

./file.d
--config=common.yaml
--config=local.yaml

# common.yaml
pipelines:
  test1:
    input:
        ...
    output:
        type: kafka
 
# local.yaml
pipelines:
  test1:
    output:
        type: file
 
# result
 
pipelines:
  test1:
    input:
        ...
    output:
        type: file
 
 
# for actions overwrite
# common.yaml
pipelines:
  test1:
    ...
    actions:
      - type: discard
 
# local.yaml
pipelines:
  test1:
    ...
    actions:
      - type: modify
 
# result
pipelines:
  test1:
    ...
    actions:
      - type: modify