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/eos_interface/tests/eapi/net_interface.yaml

@@ -0,0 +1,53 @@
+---
+- debug: msg="START eos eapi/net_interface.yaml on connection={{ ansible_connection }}"
+
+# Add minimal testcase to check args are passed correctly to
+# implementation module and module run is successful.
+
+- name: Set test interface
+  set_fact:
+    test_interface_1: ethernet1
+
+- name: Configure interface (setup)
+  net_interface:
+    name: "{{ test_interface_1 }}"
+    description: test-interface-1
+    mtu: 1800
+    state: present
+    authorize: yes
+    provider: "{{ eapi }}"
+  register: result
+
+- name: Configure interface description using platform agnostic module
+  net_interface:
+    name: "{{ test_interface_1 }}"
+    description: test-interface-initial
+    state: present
+    authorize: yes
+    provider: "{{ eapi }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - '"interface {{ test_interface_1 }}" in result.commands'
+      - '"description test-interface-initial" in result.commands'
+
+- name: Confgure interface parameters
+  net_interface:
+    name: "{{ test_interface_1 }}"
+    description: test-interface
+    mtu: 2000
+    state: present
+    authorize: yes
+    provider: "{{ eapi }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - '"interface {{ test_interface_1 }}" in result.commands'
+      - '"description test-interface" in result.commands'
+      - '"mtu 2000" in result.commands'
+
+- debug: msg="END eos eapi/net_interface.yaml on connection={{ ansible_connection }}"