[SPIKE] - "pepr build --no-embed" flag writes stderr stream with exitcode 0

[btlghrants]

Background

While working #1654 I discovered that we get strange text on stderr when running the pepr build command with the --no-embed flag:

The module still appears to build (successfully, maybe..?).
The build command returns an exit code of "0".
The stdout stream comes back empty.
The stderr stream comes back with containing an error like: "Error: Cannot find module [...])

This should be investigated. Current behavior codified in (upcoming) integration test for the pepr build cli:

• /integration/cli/build.noembed.test.ts : build > builds a module > for use as a library > builds

Definition of Done

1. figure out whether this is a "real" error or just a matter of test setup / config, and
2. fix the error (if it is one).