fix(baggage-span-processor): cannot find module

[longility]

Which problem is this PR solving?

Fixes the following error:

Error: Cannot find module '/Users/long/Repos/wise-rock/node_modules/@opentelemetry/baggage-span-processor/build/src/index.ts'. Please verify that the package.json has a valid "main" entry
    at tryPackage (node:internal/modules/cjs/loader:415:19)
    at Function.Module._findPath (node:internal/modules/cjs/loader:665:18)
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:1034:27)
    at Function.Module._resolveFilename.sharedData.moduleResolveFilenameHook.installedValue (/Users/long/Repos/wise-rock/node_modules/@cspotcode/source-map-support/source-map-support.js:811:30)
    at Function.Module._resolveFilename (/Users/long/Repos/wise-rock/node_modules/tsconfig-paths/src/register.ts:115:36)
    at Function.Module._load (node:internal/modules/cjs/loader:901:27)
    at Module.require (node:internal/modules/cjs/loader:1115:19)
    at require (node:internal/modules/helpers:130:18)
    at Object.<anonymous> (/Users/long/Repos/wise-rock/apps/api/src/tracing.ts:3:1)
    at Module._compile (node:internal/modules/cjs/loader:1241:14) {
  code: 'MODULE_NOT_FOUND',
  path: '/Users/long/Repos/wise-rock/node_modules/@opentelemetry/baggage-span-processor/package.json',
  requestPath: '@opentelemetry/baggage-span-processor'
}

To reproduce, create a solution with otel and reference BaggageSpanProcessor. Compiles successfully but blows up during runtime.

Short description of the changes

I looked at sibling packages and followed the same convention. I tested it locally by altering node_modules/@opentelemetry/baggage-span-processor directly to make sure it works. It worked after that.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.03%. Comparing base (dfb2dff) to head (22e281f).
Report is 152 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2260      +/-   ##
==========================================
- Coverage   90.97%   90.03%   -0.94%     
==========================================
  Files         146      142       -4     
  Lines        7492     6917     -575     
  Branches     1502     1457      -45     
==========================================
- Hits         6816     6228     -588     
- Misses        676      689      +13     

see 58 files with indirect coverage changes

[AbhiPrasad]

Whatever bundler test approach we end up adopting for open-telemetry/opentelemetry-js#4744 we should also then port to opentelemetry-js-contrib to catch issues like this.