Unknown extensions type "jaegerremotesampling"

[sakthiraam]

Describe the bug
I'm using the latest version of otel collector contrib and getting Unknown extensions type "jaegerremotesampling"

Steps to reproduce
run the otel collector contrib executable with the below yaml configuration.

What did you expect to see?
otel collector to start with jaegerremotesampling extension listening of gRPC and http port number defined in the config

What did you see instead?
A error as below

$ ./otelcol-contrib --config=file:./otel_test_config.yml
2022/03/19 12:08:08 proto: duplicate proto type registered: jaeger.api_v2.PostSpansRequest
2022/03/19 12:08:08 proto: duplicate proto type registered: jaeger.api_v2.PostSpansResponse
Error: failed to get config: cannot unmarshal the configuration: unknown extensions type "jaegerremotesampling" for "jaegerremotesampling" (valid values: [zpages oidc pprof memory_ballast k8s_observer asapclient fluentbit oauth2client host_observer awsproxy basicauth bearertokenauth health_check http_forwarder file_storage])
2022/03/19 12:08:08 collector server run finished with error: failed to get config: cannot unmarshal the configuration: unknown extensions type "jaegerremotesampling" for "jaegerremotesampling" (valid values: [zpages oidc pprof memory_ballast k8s_observer asapclient fluentbit oauth2client host_observer awsproxy basicauth bearertokenauth health_check http_forwarder file_storage])

What version did you use?
Version: otel collector contrib - 0.47.0

What config did you use?

extensions:
  memory_ballast:
    size_in_percentage: 40
  zpages:
    endpoint: 0.0.0.0:55679
  health_check:
    endpoint: 0.0.0.0:13133
  health_check/1:
    endpoint: 0.0.0.0:13134
    check_collector_pipeline:
      enabled: true
      interval: "5m"
      exporter_failure_threshold: 5
  pprof:
    endpoint: 0.0.0.0:1888
  jaegerremotesampling:
    http:
      endpoint: :5878
    source:
      file: /home/test/otel/strategy.json
receivers:
  otlp:
    protocols:
      grpc:
      http:
processors:
  batch:
  memory_limiter:
    limit_mib: 1536
    spike_limit_mib: 512
    check_interval: 5s
exporters:
  logging:
    logLevel: debug
service:
  pipelines:
    traces:
      receivers: [otlp]
      processors: [memory_limiter, batch]
      exporters: [logging]
    metrics:
      receivers: [otlp]
      processors: [memory_limiter, batch]
      exporters: [logging]
  extensions: [memory_ballast, zpages, health_check, pprof, jaegerremotesampling]

Environment
OS: CentOS 7

Additional context
Add any other context about the problem here.

[jpkrohling]

The Jaeger Remote Sampling extension isn't functional yet, and because of that, it hasn't been added to the distribution. See #6510 to keep an eye on the progress.