zlib package: Ensure correct lib search on Windows (#48512)

* Name of zlib's library differs on Windows; also account for name
  differing when building +shared
* `zlib`'s `.libs` implementation was searching for the runtime
  libraries (the .dlls) and should be searching for link-time libs

var/spack/repos/builtin/packages/zlib/package.py

@@ -84,7 +84,12 @@ def determine_version(cls, lib):
     @property
     def libs(self):
         shared = "+shared" in self.spec
-        return find_libraries(["libz"], root=self.prefix, recursive=True, shared=shared)
+        libnames = ["libz"]
+        if self.spec.satisfies("platform=windows"):
+            libnames.append("zdll" if shared else "zlib")
+        return find_libraries(
+            libnames, root=self.prefix, recursive=True, shared=shared, runtime=False
+        )
 
 
 class SetupEnvironment: