python: drop build-tools tag (#46980)

Remove the `build-tools` tag of python, otherwise these types of
concretizations are possible:

```
py-root
  ^py-pip
    ^python@3.12
  ^python@3.13
```

So, a package would be configured with py-pip using python 3.12, but
installed for 3.13, which does not work.

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

@@ -47,7 +47,7 @@ class Python(Package):
     url = "https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz"
     list_url = "https://www.python.org/ftp/python/"
     list_depth = 1
-    tags = ["windows", "build-tools"]
+    tags = ["windows"]
 
     maintainers("skosukhin", "scheibelp")