Ensure image-optimizer is traced for standalone mode (#32522)

This ensures we trace the `image-optimizer` for the standalone output mode as previously this was always ignored under the assumption image optimizing would be handled at the CDN level in standalone mode. 

## Bug

- [x] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`

## Documentation / Examples

- [ ] Make sure the linting passes by running `yarn lint`

Fixes: #32513

packages/next/build/index.ts

@@ -1242,12 +1242,18 @@ export default async function build(
               processCwd: dir,
               ignore: [
                 '**/next/dist/pages/**/*',
-                '**/next/dist/server/image-optimizer.js',
                 '**/next/dist/compiled/@ampproject/toolbox-optimizer/**/*',
-                '**/next/dist/server/lib/squoosh/**/*.wasm',
                 '**/next/dist/compiled/webpack/(bundle4|bundle5).js',
-                '**/node_modules/sharp/**/*',
                 '**/node_modules/webpack5/**/*',
+                '**/next/dist/server/lib/squoosh/**/*.wasm',
+                ...(ciEnvironment.hasNextSupport
+                  ? [
+                      // only ignore image-optimizer code when
+                      // this is being handled outside of next-server
+                      '**/next/dist/server/image-optimizer.js',
+                      '**/node_modules/sharp/**/*',
+                    ]
+                  : []),
               ],
             }
           )

packages/next/server/image-optimizer.ts

@@ -387,6 +387,19 @@ export async function imageOptimizer(
         optimizedBuffer = await transformer.toBuffer()
         // End sharp transformation logic
       } else {
+        if (
+          showSharpMissingWarning &&
+          nextConfig.experimental?.outputStandalone
+        ) {
+          // TODO: should we ensure squoosh also works even though we don't
+          // recommend it be used in production and this is a production feature
+          console.error(
+            `Error: 'sharp' is required to be installed in standalone mode for the image optimization to function correctly`
+          )
+          req.statusCode = 500
+          res.end('internal server error')
+          return { finished: true }
+        }
         // Show sharp warning in production once
         if (showSharpMissingWarning) {
           console.warn(