fix: Don't use require to load package.json files

[timfish]

Which problem is this PR solving?

It's currently not possible to bundle @opentelemetry/instrumentation with many bundlers.

Webpack fails because it errors with Critical dependency: The request of a dependency is an expression. This is because webpack can see the require but can't reason about what is being loaded.

Rollup can only bundle the code if you include a plugin that can load json files.

Since auto instrumentation will not work when the code is bundled, why would this change even matter?

Sentry is using @opentelemetry/instrumentation as a dependency in their Node SDK. Some users will not care about instrumentation but will want to bundle their code and using require like this to load json files makes it impossible to use some bundlers or at a minimum requires extra bundler config to work around it.

Short description of the changes

Use readFileSync + JSON.parse instead.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Covered by existing tests

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added
• Documentation has been updated

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: timfish / name: Tim Fish (3b44bec, 3702552, 1209315, 3f57eba, 269e190)
• ✅ login: pichlermarc / name: Marc Pichler (ead0231)

[codecov]

Codecov Report

Merging #4593 (ead0231) into main (c046867) will decrease coverage by 3.58%.
Report is 8 commits behind head on main.
The diff coverage is n/a.

❗ Current head ead0231 differs from pull request most recent head 269e190. Consider uploading reports for the commit 269e190 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4593      +/-   ##
==========================================
- Coverage   92.83%   89.26%   -3.58%     
==========================================
  Files         329      147     -182     
  Lines        9528     3138    -6390     
  Branches     2053      686    -1367     
==========================================
- Hits         8845     2801    -6044     
+ Misses        683      337     -346     

see 190 files with indirect coverage changes

[dyladan]

Please add a changelog entry

[timfish]

Done. Let me know if I've put it in the wrong changelog!

[pichlermarc]

This looks good, thanks for working on this. 👍