fix: Feast UI importlib change by privatedumbo · Pull Request #4248 · feast-dev/feast

What this PR does / why we need it:

Starting the UI fails when using the builtin importlib.resources.files function; it works with the one from the library importlib-resources.

The error

TypeError: 'feast.ui_server' is not a package

Proposed solution

Using the reference to the module's parent (its package) through spec (docs). We're using __spec__.parent as opposed to __package__ because __package__ does not seem to be the way according to this.

According to the python-docs, the function should work with both modules and packages, but that does not seem to be the case (link to docs).

Which issue(s) this PR fixes:

Fixes 4241.