Fixes #30073: Remove 'Consider hg command' warning. (#31159)

This PR addresses two issues:

1. The hg module was added to command module's check_command list,
so if someone runs hg directly from the command module, the command
module would warn the user "Consider using hg module rather than running hg".

We address this by removing hg from the list.

2. We added a new note to tell users push feature will be addressed
in issue #31156.

lib/ansible/modules/commands/command.py

@@ -124,7 +124,7 @@ def check_command(module, commandline):
     arguments = {'chown': 'owner', 'chmod': 'mode', 'chgrp': 'group',
                  'ln': 'state=link', 'mkdir': 'state=directory',
                  'rmdir': 'state=absent', 'rm': 'state=absent', 'touch': 'state=touch'}
-    commands = {'hg': 'hg', 'curl': 'get_url or uri', 'wget': 'get_url or uri',
+    commands = {'curl': 'get_url or uri', 'wget': 'get_url or uri',
                 'svn': 'subversion', 'service': 'service',
                 'mount': 'mount', 'rpm': 'yum, dnf or zypper', 'yum': 'yum', 'apt-get': 'apt',
                 'tar': 'unarchive', 'unzip': 'unarchive', 'sed': 'template or lineinfile',

lib/ansible/modules/source_control/hg.py

@@ -78,6 +78,7 @@ options:
             - Path to hg executable to use. If not supplied,
               the normal mechanism for resolving binary paths will be used.
 notes:
+    - "This module does not support push capability. See U(https://github.com/ansible/ansible/issues/31156)."
     - "If the task seems to be hanging, first verify remote host is in C(known_hosts).
       SSH will prompt user to authorize the first contact with a remote host.  To avoid this prompt,
       one solution is to add the remote host public key in C(/etc/ssh/ssh_known_hosts) before calling