tests: monkeypatch `util.get_password()` to avoid deadlocks on Windows stable

tests: monkeypatch `util.get_password()` to avoid deadlocks on Windows

This should have been part of 5b3513177f2b.

Differential Revision: https://phab.mercurial-scm.org/D10759

--- a/tests/test-http-bundle1.t	Tue May 04 10:46:50 2021 +0200
+++ b/tests/test-http-bundle1.t	Thu May 20 14:20:39 2021 -0400
@@ -192,10 +192,10 @@
   $ cat pid >> $DAEMON_PIDS
 
   $ cat << EOF > get_pass.py
-  > import getpass
-  > def newgetpass(arg):
+  > from mercurial import util
+  > def newgetpass():
   >   return "pass"
-  > getpass.getpass = newgetpass
+  > util.get_password = newgetpass
   > EOF
 
   $ hg id http://localhost:$HGPORT2/

--- a/tests/test-http.t	Tue May 04 10:46:50 2021 +0200
+++ b/tests/test-http.t	Thu May 20 14:20:39 2021 -0400
@@ -181,10 +181,10 @@
   $ cat pid >> $DAEMON_PIDS
 
   $ cat << EOF > get_pass.py
-  > import getpass
-  > def newgetpass(arg):
+  > from mercurial import util
+  > def newgetpass():
   >   return "pass"
-  > getpass.getpass = newgetpass
+  > util.get_password = newgetpass
   > EOF
 
   $ hg id http://localhost:$HGPORT2/

--- a/tests/test-largefiles-wireproto.t	Tue May 04 10:46:50 2021 +0200
+++ b/tests/test-largefiles-wireproto.t	Thu May 20 14:20:39 2021 -0400
@@ -425,10 +425,10 @@
   >          -d -p $HGPORT --pid-file hg.pid -A access.log
   $ cat hg.pid >> $DAEMON_PIDS
   $ cat << EOF > get_pass.py
-  > import getpass
-  > def newgetpass(arg):
+  > from mercurial import util
+  > def newgetpass():
   >   return "pass"
-  > getpass.getpass = newgetpass
+  > util.get_password = newgetpass
   > EOF
   $ hg clone --config ui.interactive=true --config extensions.getpass=get_pass.py \
   >          http://user@localhost:$HGPORT credentialclone