Remove unnecessary features from cli_command (#43829)

* Remove wait_for & associated params

* Upgrade command dict to top-level, remove more wait_for accessories

* We don't need all this anymore

* Update docs

* Update tests to new argspec

* Be a little more explicit about sendonly

Also remove reference to the word provider.

* Add example of prompt and answer

test/integration/targets/junos_command/tests/cli/cli_commmand.yaml

@@ -0,0 +1,29 @@
+---
+- debug:
+    msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
+
+- name: get output for single command
+  cli_command:
+    commands:
+      - show version
+  register: result
+
+- assert:
+    that:
+      - "result.changed == false"
+      - "result.stdout is defined"
+
+- name: get output for multiple commands
+  cli_command:
+    commands:
+      - show version
+      - show interfaces
+  register: result
+
+- assert:
+    that:
+      - "result.changed == false"
+      - "result.stdout is defined"
+      - "result.stdout | length == 2"
+
+- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"