Add very basic openvswitch_bridge integration test (#33134)

More to come on this module.

test/integration/targets/openvswitch_bridge/aliases

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+non_local

test/integration/targets/openvswitch_bridge/defaults/main.yaml

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+---
+testcase: "*"
+test_items: []

test/integration/targets/openvswitch_bridge/meta/main.yaml

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+dependencies:
+  - prepare_ovs_tests

test/integration/targets/openvswitch_bridge/tasks/main.yml

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+---
+
+- name: collect all test cases
+  find:
+    paths: "{{ role_path }}/tests"
+    patterns: "{{ testcase }}.yaml"
+  delegate_to: localhost
+  register: test_cases
+
+- name: set test_items
+  set_fact: test_items="{{ test_cases.files | map(attribute='path') | list }}"
+
+- name: run test case
+  include: "{{ test_case_to_run }}"
+  with_items: "{{ test_items }}"
+  loop_control:
+    loop_var: test_case_to_run

test/integration/targets/openvswitch_bridge/tests/basic.yaml

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+---
+
+- name: Make sure test bridge does not exist before tests
+  command: ovs-vsctl del-br br-test
+
+- name: Create bridge
+  openvswitch_bridge:
+    bridge: br-test
+  register: result
+
+- assert:
+    that:
+      - "result.changed == true"
+
+- name: Create bridge again (idempotent)
+  openvswitch_bridge:
+    bridge: br-test
+  register: result
+
+- assert:
+    that:
+      - "result.changed == false"
+
+- name: Tear down test bridge
+  command: ovs-vsctl del-br br-test