CMake: Use RelWithDebInfo for Conda Windows Debug builds.

Python is not provided with debug libraries, so debug builds are not possible.
Building as RelWithDebInfo will build debug information for the binary, while
using the available release libraries.

CMakePresets.json

@@ -276,7 +276,13 @@
         "inherits": [
           "conda-debug",
           "conda-windows"
-        ]
+        ],
+        "cacheVariables": {
+          "CMAKE_BUILD_TYPE": {
+            "type": "STRING",
+            "value": "RelWithDebInfo"
+          }
+        }
       },
       {
         "name": "conda-windows-release",