use show run instead of section pipeline ios_l2_interface (#39658)

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

lib/ansible/modules/network/ios/ios_l2_interface.py

@@ -146,10 +146,9 @@ def is_switchport(name, module):
 
 def interface_is_portchannel(name, module):
     if get_interface_type(name) == 'ethernet':
-        config = get_config(module, flags=[' | section interface'])
-        if 'channel group' in config:
+        config = run_commands(module, ['show run interface {0}'.format(name)])[0]
+        if any(c in config for c in ['channel group', 'channel-group']):
             return True
-
     return False