fix: reinstall if required is source and installed is from registry.

[ruben-arts]

When you switch from a registry package to a local source package, pixi should re-install it. This was previously not checked in the installation planner. This PR adds that check. But it doesn't fix the complete problem as we still get it from the cache afterward, so this PR is the first in a series to fix the problem of reinstallation completely.

Reproducer:
First pixi install this:

[project]
channels = ["conda-forge"]
name = "pixi_test"
platforms = ["osx-arm64"]

[tasks]
check = "python -c 'import yaml; print(yaml.__file__)'"

[dependencies]
python = ">=3.9,<3.14"

[pypi-dependencies]
pyyaml = "==6.0.2,<7"

Then clone the pyyaml package: git clone --branch 6.0.2 git@github.com:yaml/pyyaml.git
And modify the pixi.toml to:

[project]
channels = ["conda-forge"]
name = "pixi_test"
platforms = ["osx-arm64"]

[tasks]
check = "python -c 'import yaml; print(yaml.__file__)'"

[dependencies]
python = ">=3.9,<3.14"

[pypi-dependencies]
pyyaml = { path = "pyyaml", editable=false }

This will now throw the reinstall plan with:

 INFO pixi::install_pypi: re-installing 'pyyaml' because: 'Installed from registry from 'registry' but locked to a non-registry location from 'pyyaml''

This will then not correctly install it as it is using the wrong cache, but that will be fixed later 🤞