pipx: fix state=latest w/ install_deps=true (#6303)

* pipx and pipx_info: Document that modules require pipx 0.16.2.1 or above

Since their introduction, these modules rely on 'pipx list --json' to
return machine-readable output about installed pipx applications. That
functionality was introduced in 0.16.2, along with a critical bug fix
(invalid json) in 0.16.2.1.

* pipx: fix state=latest with install_deps=true

"pipx upgrade" stopped supporting the "--include-deps" option
("install_deps" in the ansible module) in pipx 0.15
(https://pypa.github.io/pipx/changelog/#01500).

The lack of support causes the pipx module to fail if attempting to use
state=latest with install_deps, since the parameter is passed to both
pipx install (fine) and pipx upgrade (fails).

* Add changelog fragment

tests/integration/targets/pipx/tasks/main.yml

@@ -184,6 +184,19 @@
     name: tox
   register: uninstall_tox_latest_again
 
+- name: install application tox with deps
+  community.general.pipx:
+    state: latest
+    name: tox
+    install_deps: true
+  register: install_tox_with_deps
+
+- name: cleanup tox latest yet again
+  community.general.pipx:
+    state: absent
+    name: tox
+  register: uninstall_tox_again
+
 - name: check assertions tox latest
   assert:
     that:
@@ -198,6 +211,10 @@
       - install_tox_latest_with_preinstall_again_force is changed
       - install_tox_latest_with_preinstall_again_force.application.tox.version == latest_tox_version
       - uninstall_tox_latest_again is changed
+      - install_tox_with_deps is changed
+      - install_tox_with_deps.application.tox.version == latest_tox_version
+      - uninstall_tox_again is changed
+      - "'tox' not in uninstall_tox_again.application"
 
 ##############################################################################
 - name: ensure application ansible-lint is uninstalled