feat(otel): stabilize OpenTelemetry support (#29822)

This commit stabilizes support for OpenTelemetry in Deno,
effectively removing the need to use `--unstable-otel` flag
or using `{ "unstable": ["otel"] }` option in the config file.

Supersedes https://github.com/denoland/deno/pull/29500
Closes https://github.com/denoland/deno/issues/29477

runtime/js/90_deno_ns.js

@@ -166,6 +166,7 @@ const denoNs = {
   umask: fs.umask,
   HttpClient: httpClient.HttpClient,
   createHttpClient: httpClient.createHttpClient,
+  telemetry: telemetry.telemetry,
 };
 
 const denoNsUnstableById = { __proto__: null };
@@ -229,8 +230,4 @@ ObjectDefineProperties(denoNsUnstableById[unstableIds.webgpu], {
 
 // denoNsUnstableById[unstableIds.workerOptions] = { __proto__: null }
 
-denoNsUnstableById[unstableIds.otel] = {
-  telemetry: telemetry.telemetry,
-};
-
 export { denoNs, denoNsUnstableById, unstableIds };