fix depot_tools on macOS Catalina by upgrading it to 23247b9 (#3441)

Fixes: #3440
Fixes: #3153

.github/workflows/ci.yml

@@ -59,6 +59,14 @@ jobs:
           python-version: "2.7.16"
           architecture: x64
 
+      - name: Remove unused versions of Python
+        if: startsWith(matrix.os, 'windows')
+        run: |-
+          $env:PATH -split ";" |
+            Where-Object { Test-Path "$_\python.exe" } |
+            Select-Object -Skip 1 |
+            ForEach-Object { Move-Item "$_" "$_.disabled" }
+
       - name: Environment (common)
         run: |
           echo ::set-env name=GH_ACTIONS::1

tools/gclient_config.py

@@ -26,7 +26,7 @@ solutions = [
     },
     {
         'url':
-        'https://chromium.googlesource.com/chromium/tools/depot_tools@efce0d1b7657c440c90f0f4bce614b96672b9e0b',
+        'https://chromium.googlesource.com/chromium/tools/depot_tools@23247b99321549c24e62ad45200409419423695d',
         'name':
         'depot_tools'
     },