fix connection gets overridden by network_cli for transport nxapi,eapi net_* modules (#34778)

* fix connection gets overridden by network_cli for transport nxapi,eapi net_* modules

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

* Define functions in individual action plugins to avoid code duplication

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

* Add net_* eos tests for eapi

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

* update plugin code

test/integration/targets/nxos_system/tests/nxapi/net_system.yaml

@@ -0,0 +1,38 @@
+---
+- debug: msg="START nxos nxapi/net_system.yaml on connection={{ ansible_connection }}"
+- debug: msg="Using provider={{ connection.transport }}"
+
+# Add minimal testcase to check args are passed correctly to
+# implementation module and module run is successful.
+
+- name: setup
+  nxos_config:
+    lines:
+      - no ip domain-list ansible.com
+      - no ip domain-list redhat.com
+    match: none
+    provider: "{{ nxapi }}"
+
+- name: configure domain_list using platform agnostic module
+  net_system:
+    domain_search:
+      - ansible.com
+      - redhat.com
+    provider: "{{ nxapi }}"
+  register: result
+
+- assert:
+    that:
+      - result.changed == true
+      - "'ip domain-list ansible.com' in result.commands"
+      - "'ip domain-list redhat.com' in result.commands"
+
+- name: setup
+  nxos_config:
+    lines:
+      - no ip domain-list ansible.com
+      - no ip domain-list redhat.com
+    match: none
+    provider: "{{ nxapi }}"
+
+- debug: msg="END nxos nxapi/net_system.yaml on connection={{ ansible_connection }}"