Digital Ocean integration test for digital_ocean_tag (#49169)

* Add Digital Ocean integration test template

- Actual integration tests will come shortly

* Add digital_ocean-tag test

* Add integration test for creating and deleting tags

* Remove cloud confiugration file

* Enhancements for integration test for idempotency
- Added new lines per review
- Added proper tests for idempotency checks
- Actual module is broken so deletion test doesn't work

* Add check for do_api_key and instruct if it doesn't work.

* Fix indentation

* Remove idempotency test for nonidempotency action

* Add notes for delete idempotency

test/integration/targets/digital_ocean_tag/aliases

@@ -0,0 +1,2 @@
+digital_ocean
+unsupported

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

@@ -0,0 +1,51 @@
+---
+- block:
+  - name: Test API key is provided.
+    fail:
+      msg: do_api_key should be defined in integration_config.yml
+    when: do_api_key is not defined
+
+  - name: Create a new tag
+    digital_ocean_tag:
+      oauth_token: '{{do_api_key}}'
+      name: integration-test
+      state: present
+    register: create_tag
+
+  - name: Create a new tag for idempotency
+    digital_ocean_tag:
+      oauth_token: '{{do_api_key}}'
+      name: integration-test
+      state: present
+    register: create_tag_idempotent
+
+  - debug:
+      var: create_tag
+
+  - assert:
+      that:
+        - create_tag.changed == True
+        - create_tag_idempotent.changed == False
+        - create_tag.data.tag.name == "integration-test"
+
+  always:
+  - name: Delete tag
+    digital_ocean_tag:
+      oauth_token: '{{do_api_key}}'
+      name: integration-test
+      state: absent
+    register: delete_tag
+
+# FIXME: Deleting a tag isn't idempotent
+#  - name: Delete tag with idempotency
+#    digital_ocean_tag:
+#      oauth_token: '{{do_api_key}}'
+#      name: integration-test
+#      state: absent
+#    register: delete_tag_idempotent
+
+  - assert:
+      that:
+        - delete_tag.changed == True
+# FIXME: Deleting a tag isn't idempotent
+#        - delete_tag_idempotent.changed == False