Add routing connector and processor

[dpacheconr]

Add routing connector and routing processor
Both allow users to send data to multiple NR accounts should they need to
Example configuration using routing connector

exporters:
  logging:
    verbosity: detailed
  otlp/masteraccount:
    endpoint: https://otlp.nr-data.net:4318
    headers:
      api-key: "xxxNRAL"
  otlp/account1:
    endpoint: https://otlp.nr-data.net:4318
    headers:
      api-key: "xxxNRAL"
  otlp/account2:
    endpoint: https://otlp.nr-data.net:4318
    headers:
      api-key: "xxxNRAL"

connectors:           
  routing/metrics:
    default_pipelines: [metrics/masteraccount]
    error_mode: propagate
    match_once: false
    table:
      - statement: route() where attributes["k8s.namespace.name"] == "account2"
        pipelines: [metrics/account2]

  routing/logs:
    default_pipelines: [logs/masteraccount]
    error_mode: propagate
    match_once: false
    table:
      - statement: route() where attributes["k8s.namespace.name"] == "account2"
        pipelines: [logs/account2]


    metrics:
      receivers:
        - hostmetrics
        - kubeletstats
        - prometheus
      processors:
        - metricstransform/hostmetrics_cpu
        - transform/truncate
        - filter/exclude_cpu_utilization
        - filter/exclude_memory_utilization
        - filter/exclude_memory_usage
        - filter/exclude_filesystem_utilization
        - filter/exclude_filesystem_usage
        - filter/exclude_filesystem_inodes_usage
        - filter/exclude_system_disk
        - filter/exclude_system_paging
        - filter/exclude_network
        - attributes/exclude_system_paging
        - resourcedetection/env
        - resourcedetection/cloudproviders
        - resource
        - k8sattributes
        - attributes/self
        - memory_limiter
        - groupbyattrs
        - batch
      exporters:
        - routing/metrics

    metrics/masteraccount:
      receivers: [routing/metrics] 
      exporters: [otlp/masteraccount]
    metrics/account1:
      receivers: [routing/metrics]
      exporters: [otlp/account1]
    metrics/account2:
      receivers: [routing/metrics]
      exporters: [otlp/account2]

    logs:
      receivers:
        - filelog
      processors:
        - transform/truncate
        - resource
        - k8sattributes
        - batch
        - groupbyattrs
      exporters:
        - routing/logs

    logs/masteraccount:
      exporters: [otlp/masteraccount]
      receivers: [routing/logs]
    logs/account1:
      receivers: [routing/logs]
      exporters: [otlp/account1]
    logs/account2:
      receivers: [routing/logs]
      exporters: [otlp/account2]