Allow configuring streams in the values.yaml

[charlie-haley]

Instead of manually creating and referencing a config map, users should be able to specify multiple pipelines as part of the chart to use with streams mode. e.g:

streams:
  enabled: true
  pipelines:
  - hello.yaml:
      input:
        generate:
          mapping: root = "woof"
          interval: 5s
          count: 0
      output:
        stdout:
          codec: lines
  - aaaaa.yaml:
      input:
        generate:
          mapping: root = "meow"
          interval: 2s
          count: 0
      output:
        stdout:
          codec: lines