build(ansible): install gdown via pipx (#6746)

Signed-off-by: Mete Fatih Cırıt <mfc@autoware.org>

Author: xmfcx

ansible/roles/gdown/README.md

@@ -9,6 +9,5 @@ None.
 ## Manual Installation
 
 ```bash
-# Install gdown to download files from CMakeLists.txt
-pip3 install gdown
+pipx install gdown
 ```

ansible/roles/gdown/tasks/main.yaml

@@ -1,17 +1,4 @@
-# noqa: risky-shell-pipe, no-changed-when
-
 - name: Install gdown to download files from CMakeLists.txt
-  ansible.builtin.shell: |
-    set -o pipefail
-    pip3 list | grep -q gdown || pip3 install --break-system-packages gdown
-  args:
-    executable: /bin/bash
-  when: rosdistro == 'jazzy'
-
-- name: Install gdown to download files from CMakeLists.txt (non-jazzy)
-  ansible.builtin.pip:
-    name:
-      - gdown
-    state: latest
-    executable: pip3
-  when: rosdistro != 'jazzy'
+  community.general.pipx:
+    name: gdown
+    executable: /usr/bin/pipx