[opentelemetry/auto-instrumentations-web] esm directory missing in release 0.34.0

[adamlyka]

When attempting to use the latest version of opentelemetry/auto-instrumentations-web my project fails to build with the following error:
Failed to resolve entry for package "@opentelemetry/auto-instrumentations-web". The package may have incorrect main/module/exports specified in its package.json.

I noticed the esm directory was missing and causing the failure:
https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/metapackages/auto-instrumentations-web/src

opentelemetry-js-contrib/metapackages/auto-instrumentations-web/package.json

Line 15 in 99db4bb

"module": "build/esm/index.js",

[JamieDanielson]

I was looking into this and was able to repro using Vite, which sets ESNext as the transform target. I used one of the web example apps with Vite instead of webpack (tsc && vite build). It looks like the esm files were built but not included in "files" in the package.json, and esnext was not built at all. The individual instrumentations were fixed up with #1776 , but the same is needed for the metapackage.

I've opened #1848 to fix this.