pythongh-132649: Allow passing --include-tcltk to PC\layout on Windows ARM64 (pythonGH-132650)

(cherry picked from commit b87189d)

Co-authored-by: Steve Dower <[email protected]>

Author: miss-islington

Misc/NEWS.d/next/Build/2025-04-17-19-10-15.gh-issue-132649.DZqGoq.rst

@@ -0,0 +1,2 @@
+The :file:`PC\layout` script now allows passing ``--include-tcltk`` on
+Windows ARM64.

PC/layout/main.py

@@ -657,7 +657,7 @@ def main():
     if ns.arch not in ("win32", "amd64", "arm32", "arm64"):
         log_error("--arch is not a valid value (win32, amd64, arm32, arm64)")
         return 4
-    if ns.arch in ("arm32", "arm64"):
+    if ns.arch == "arm32":
         for n in ("include_idle", "include_tcltk"):
             if getattr(ns, n):
                 log_warning(f"Disabling --{n.replace('_', '-')} on unsupported platform")