Reinstallation might skip the use of the package cache

[ruben-arts]

Checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pixi, using pixi --version.

Reproducible example

When installing a project with pypi dependencies the python build environments need to be installed using conda. I found that the installation might be slow because it doesn't always use the cache for all the packages that it needs.

I could reproduce it on https://github.com/sklearn-compat/sklearn-compat.

# Install once to fill the package cache, because by default it's not satisfied it will also install the build envs.
> pixi install
# Clean the environments to force a reinstallation
> pixi clean
# Change a single thing in the `pyproject.toml` to force a resolve of the pypi dependencies
> pixi project version set 1.2.3

# Test the solve again
> pixi install -v 
# This takes minutes on my machine because it starts downloading SOME packages which is non deterministic

Expected behavior

Environment installations should always use the cache when it was already installed before.

[baszalmstra]

Fixed by conda/rattler#977