Authenticator - Sigv4 - unknown extensions type - release-0.47.0

Describe the bug unknown extensions type "sigv4auth" for "sigv4auth"

Steps to reproduce

What did you expect to see? OTEL to export prom metrics to AWS

What did you see instead?

Error: failed to get config: cannot unmarshal the configuration: unknown extensions type "sigv4auth" for "sigv4auth" (valid values: [file_storage zpages awsproxy fluentbit pprof bearertokenauth host_observer basicauth k8s_observer oidc oauth2client memory_ballast asapclient health_check http_forwarder])
2022/03/22 07:03:06 collector server run finished with error: failed to get config: cannot unmarshal the configuration: unknown extensions type "sigv4auth" for "sigv4auth" (valid values: [file_storage zpages awsproxy fluentbit pprof bearertokenauth host_observer basicauth k8s_observer oidc oauth2client memory_ballast asapclient health_check http_forwarder])

What version did you use? v0.47.0

What config did you use?

      apiVersion: opentelemetry.io/v1alpha1
      kind: OpenTelemetryCollector
      metadata:
        name: metrics
      spec:
        mode: deployment
        image: otel/opentelemetry-collector-contrib:0.47.0
        config: |
          extensions:
            sigv4auth:
              assume_role:
                arn: "arn:aws:iam::1111111111111:role/test-metrics-prometheus"
          receivers:
            prometheus/fluentbit:
              config:
                global:
                  scrape_interval: 5m
                  scrape_timeout: 1m
          exporters:
            prometheusremotewrite:
              endpoint: "https://....."
              namespace: cshared
              auth:
                authenticator: sigv4auth
          service:
            extensions: [sigv4auth]
            pipelines:
              metrics:
                receivers: [prometheus/fluentbit]
                processors: []
                exporters: [prometheusremotewrite]

Environment EKS

Additional context Add any other context about the problem here.

open-telemetry / opentelemetry-collector-contrib

Authenticator - Sigv4 - unknown extensions type - release-0.47.0 #8779