fix(gatsby-telemetry): Read installedGatsbyVersion correctly for workspaces

[sidharthachatterjee]

For yarn workspaces (when process.cwd()) is not the parent directory where node_modules includes gatsby, the current code is unable to read the installed gatsby version. This attempts to fix that.

Remember that main for the gatsby package is cache-dir/commonjs/gatsby-browser-entry.js so we need to strip out three segments to be able to resolve to root

Co drafted with the wonderful @jamo

[jamo]

I released this as gatsby@3.3.0-telemetry-test.33+f514204bc5 and test with yarn workspaces works.

We would need to backport this to v2 to get the widest distribution of this hotfix.

[jamo]

Seems that e2e_tests_pnp is failing but I guess it's ok 😬

[pieh]

Thanks!

[vladar]

Published in gatsby-telemetry@2.4.1