Move update_idl.py to tools\win

update_idl.py was written for updating IDL files in chrome/updater but
turns out to be a crucial tool for updating all IDL files. This moves
update_idl.py in preparation for some updates to generalize and improve
it.

Change-Id: I62af367cf8b1d3c4c3cc8c6a0688c7fbaee46e6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4242108
Reviewed-by: Xiaoling Bao <xiaolingbao@chromium.org>
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1104322}

docs/updater/dev_manual.md

@@ -145,7 +145,7 @@ ninja: build stopped: subcommand failed.
 
 You can then run the following command to update IDL COM files for all flavors:
 ```
-python3 chrome/updater/tools/update_idl.py
+python3 tools/win/update_idl.py
 ```
 
 ## Debugging

tools/win/OWNERS

@@ -1,3 +1,5 @@
 ajgo@chromium.org
 brucedawson@chromium.org
 jessemckenna@google.com
+
+per-file update_idl.py=xiaolingbao@chromium.org,ganesh@chromium.org

tools/win/update_idl.py

@@ -6,7 +6,7 @@
 This tool must be run from a Windows machine at the source root directory.
 
 Example:
-    python3 chrome/updater/tools/update_idl.py
+    python3 tools/win/update_idl.py
 """
 
 import os