Switch to Ansible Galaxy compatible requirements files for tests (#6549)

Switch to Ansible Galaxy compatible requirements files for tests.

tests/integration/requirements.yml

@@ -3,9 +3,7 @@
 # GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-integration_tests_dependencies:
+collections:
 - ansible.posix
 - community.crypto
 - community.docker
-unit_tests_dependencies:
-- community.internal_test_tools

tests/unit/requirements.yml

@@ -0,0 +1,7 @@
+---
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+collections:
+- community.internal_test_tools