Update Grafana Agent distribution components (open-telemetry#31448)

**Description:** This adds Grafana Agent as a distribution to some new
components after the Grafana Agent v0.40 release.

https://github.com/grafana/agent/blob/v0.40.0/CHANGELOG.md

**Documentation:** Adding links to grafana agent in the
alphabetically-sorted list.

processor/resourcedetectionprocessor/README.md

@@ -4,13 +4,14 @@
 | Status        |           |
 | ------------- |-----------|
 | Stability     | [beta]: traces, metrics, logs   |
-| Distributions | [contrib], [aws], [liatrio], [observiq], [redhat], [splunk], [sumo] |
+| Distributions | [contrib], [aws], [grafana], [liatrio], [observiq], [redhat], [splunk], [sumo] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aprocessor%2Fresourcedetection%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aprocessor%2Fresourcedetection) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aprocessor%2Fresourcedetection%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aprocessor%2Fresourcedetection) |
 | [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@Aneurysm9](https://www.github.com/Aneurysm9), [@dashpole](https://www.github.com/dashpole) |
 
 [beta]: https://github.com/open-telemetry/opentelemetry-collector#beta
 [contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
 [aws]: https://github.com/aws-observability/aws-otel-collector
+[grafana]: https://github.com/grafana/agent
 [liatrio]: https://github.com/liatrio/liatrio-otel-collector
 [observiq]: https://github.com/observIQ/observiq-otel-collector
 [redhat]: https://github.com/os-observability/redhat-opentelemetry-collector

processor/resourcedetectionprocessor/metadata.yaml

@@ -4,7 +4,7 @@ status:
   class: processor
   stability:
     beta: [traces, metrics, logs]
-  distributions: [contrib, splunk, observiq, sumo, aws, redhat, liatrio]
+  distributions: [contrib, splunk, observiq, sumo, aws, redhat, liatrio, grafana]
   codeowners:
     active: [Aneurysm9, dashpole]
 

reports/distributions/grafana.yaml

@@ -19,6 +19,7 @@ components:
         - attributes
         - k8sattributes
         - probabilistic_sampler
+        - resourcedetection
         - span
         - tail_sampling
         - transform