Ansible: Fix connection plugins and add support for NETCONF (#72370)

* ansible: Fix use of connection plugins

Ansible tries to execute the ansible-connection script as a python
script from within it's task executor. This does not work when it is
encapsulated in a shell script. Therefore remove the call to the python
interpreter and use the wrapped version directly.

Fixes #71342

* ansible: Add ncclient to support NETCONF connections

* ansible: Some cleanups

- boto was dropped from propagatedBuildInputs in 4af94d0f
- lib/ansible/constants.py does not have "/usr" anywhere in v2.4..v2.9

pkgs/development/python-modules/ansible/default.nix

@@ -6,12 +6,12 @@
 , jinja2
 , pyyaml
 , httplib2
-, boto
 , six
 , netaddr
 , dnspython
 , jmespath
 , dopy
+, ncclient
 , windowsSupport ? false
 , pywinrm
 }:
@@ -28,7 +28,9 @@ buildPythonPackage rec {
   };
 
   prePatch = ''
-    sed -i "s,/usr/,$out," lib/ansible/constants.py
+    # ansible-connection is wrapped, so make sure it's not passed
+    # through the python interpreter.
+    sed -i "s/\[python, /[/" lib/ansible/executor/task_executor.py
   '';
 
   postInstall = ''
@@ -39,7 +41,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     pycrypto paramiko jinja2 pyyaml httplib2
-    six netaddr dnspython jmespath dopy
+    six netaddr dnspython jmespath dopy ncclient
   ] ++ lib.optional windowsSupport pywinrm;
 
   # dificult to test