ref(aws-serverless): Remove dead vendored aws-sdk OTel instrumentation

The vendored OpenTelemetry `AwsInstrumentation` and its service extensions are
dead code: aws-sdk spans come from the channel-based `awsIntegration()` in
`@sentry/server-utils`, and nothing instantiated the vendored class. Remove the
whole tree and the now-unused `@opentelemetry/instrumentation` and
`@opentelemetry/api` dependencies.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: andreiborza

packages/aws-serverless/package.json

@@ -62,8 +62,6 @@
     "access": "public"
   },
   "dependencies": {
-    "@opentelemetry/api": "^1.9.1",
-    "@opentelemetry/instrumentation": "^0.220.0",
     "@sentry/conventions": "^0.16.0",
     "@sentry/core": "10.67.0",
     "@sentry/node": "10.67.0",

packages/aws-serverless/rollup.npm.config.mjs

@@ -35,8 +35,6 @@ export default [
       // packages with bundles have a different build directory structure
       hasBundles: true,
       packageSpecificConfig: {
-        // Used for our custom eventContextExtractor
-        external: ['@opentelemetry/api'],
         output: {
           preserveModulesRoot: 'src',
         },