fix cipd_impl.ps1 failure when depot_tools path contains whitespaces

Bug: 428834916
Change-Id: I190c63ef6f9f9c1decab4a2f410aa18699e6f273
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6700873
Commit-Queue: Scott Lee <ddoman@chromium.org>
Reviewed-by: Gavin Mak <gavinmak@google.com>

cipd.bat

@@ -77,7 +77,7 @@ exit /b %EXPORT_ERRORLEVEL%
 :: in the file's properties dialog.
 echo.>"%~dp0.cipd_impl.ps1:Zone.Identifier"
 powershell -NoProfile -ExecutionPolicy RemoteSigned ^
-    "%~dp0.cipd_impl.ps1" ^
+    -File "%~dp0.cipd_impl.ps1" ^
     -CipdBinary "%CIPD_BINARY%" ^
     -Platform "%CIPD_PLATFORM%" ^
     -BackendURL "%CIPD_BACKEND%" ^