Port eos tests to network_cli (#33586)

* Add eos and fix tests to run multiple connections

* Update tests to report connection

* Add missing START messages

* Fix unspecified connection

* Python 3 updates

Exceptions don't have `.message` in Python 3

* Override `become` when using `connection=local`

* Slight restructuring to make eapi easier later on

* Move eapi toggle to prepare_eos
* Pull out connection on eapi tasks

test/integration/targets/eos_command/tests/cli/invalid.yaml

@@ -1,5 +1,5 @@
 ---
-- debug: msg="START cli/invalid.yaml"
+- debug: msg="START cli/invalid.yaml on connection={{ ansible_connection }}"
 
 - name: run invalid command
   eos_command:
@@ -27,4 +27,4 @@
       - "result.failed == true"
       - "result.msg is defined"
 
-- debug: msg="END cli/invalid.yaml"
+- debug: msg="END cli/invalid.yaml on connection={{ ansible_connection }}"