test(performance-tests): create performance test package

[siddsriv]

Issue

Internal JS-6417

Description

Prepare a new performance tests package (JSv3 SDK: operational)

• First metric: we start with refactoring the existing bundle size measurement infra in the SDK, to be used in the new performance-tests package for json outputs to stdout, instead of markdown reports.

Testing

test.sh serves as the entry point for running performance tests, and will output results to stdout.

Checklist

• If the PR is a feature, add integration tests (*.integ.spec.ts) or E2E tests.
  • It's not a feature.
• My E2E tests are resilient to concurrent i/o.
  • I didn't write any E2E tests.
• I added access level annotations e.g. @public, @internal tags and enabled doc generation on the package. Remember that access level annotations go below the description, not above.
  • I didn't add any public functions.
• Streams - how do they work?? My WebStream readers/locks are properly lifecycled. Node.js stream backpressure is handled. Error handling.
  • No streams here.

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[siddsriv]

https://gist.github.com/mohanpedala/1e2ff5661761d3abd0385e8223e16425?permalink_comment_id=3799230