fix: cache URLs on Windows

Closes python-poetry#4479

The previous implementation would fail to install packages on Windows
because it creates a `Path` starting with a slash. Such a `Path` is
invalid on Windows. Instead, use the utility function url_to_path.

poetry/installation/executor.py

@@ -18,6 +18,7 @@
 
 from poetry.core.packages.file_dependency import FileDependency
 from poetry.core.packages.package import Package
+from poetry.core.packages.utils.utils import url_to_path
 from poetry.core.packages.utils.link import Link
 from poetry.core.pyproject.toml import PyProjectTOML
 from poetry.utils._compat import decode
@@ -678,10 +679,10 @@ def _download_link(self, operation: Union[Install, Update], link: Link) -> Link:
         return archive
 
     @staticmethod
-    def _validate_archive_hash(archive: Path, package: Package) -> str:
+    def _validate_archive_hash(archive: Union[Path, Link], package: Package) -> str:
         file_dep = FileDependency(
             package.name,
-            Path(archive.path) if isinstance(archive, Link) else archive,
+            url_to_path(archive.url) if isinstance(archive, Link) else archive,
         )
         archive_hash = "sha256:" + file_dep.hash()
         known_hashes = {f["hash"] for f in package.files}