[receiver/file] Fix the stated supported telemetry types (#27684)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
Logs and traces are not supported telemetry types for the file receiver,
and the collector will fail to start if it the receiver is in included
in a pipeline of either of these types. This change is to correct the
README to properly reflect this.

**Link to tracking Issue:** <Issue number if applicable>
Resolves #27682

**Testing:** <Describe what testing was performed and which tests were
added.>

**Documentation:** <Describe the documentation added.>

receiver/filereceiver/README.md

@@ -3,7 +3,7 @@
 <!-- status autogenerated section -->
 | Status        |           |
 | ------------- |-----------|
-| Stability     | [development]: metrics, traces, logs   |
+| Stability     | [development]: metrics   |
 | Distributions | [contrib] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Areceiver%2Ffile%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Areceiver%2Ffile) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Areceiver%2Ffile%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Areceiver%2Ffile) |
 | [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@pmcollins](https://www.github.com/pmcollins), [@djaglowski](https://www.github.com/djaglowski) |

receiver/filereceiver/metadata.yaml

@@ -3,7 +3,7 @@ type: file
 status:
   class: receiver
   stability:
-    development: [metrics, traces, logs]
+    development: [metrics]
   distributions: [contrib]
   codeowners:
     active: [pmcollins, djaglowski]