Add huawei cloud controller (#10198)

* Add huaweicloud as external cloud controller

* Add huaweicloud example config

* Rename AK,SK to ACCESS_KEY and SECRET_KEY

* Add reference to huaweicloud

* Fix variable naming

* Fix env var name

* Update example

* Fix variable naming

* Fix cloud_config path

* Add namespace for leader election

* Revert reviewers

* Delete OWNERS

Delete owners who are not responsible here.

* Fix build validation

roles/kubernetes-apps/external_cloud_controller/huaweicloud/tasks/huaweicloud-credential-check.yml

@@ -0,0 +1,33 @@
+---
+- name: External Huawei Cloud Controller | check external_huaweicloud_auth_url value
+  fail:
+    msg: "external_huaweicloud_auth_url is missing"
+  when: external_huaweicloud_auth_url is not defined or not external_huaweicloud_auth_url
+
+
+- name: External Huawei Cloud Controller | check external_huaweicloud_access_key value
+  fail:
+    msg: "you must set external_huaweicloud_access_key"
+  when:
+    - external_huaweicloud_access_key is not defined or not external_huaweicloud_access_key
+
+- name: External Huawei Cloud Controller | check external_huaweicloud_secret_key value
+  fail:
+    msg: "external_huaweicloud_secret_key is missing"
+  when:
+    - external_huaweicloud_access_key is defined
+    - external_huaweicloud_access_key|length > 0
+    - external_huaweicloud_secret_key is not defined or not external_huaweicloud_secret_key
+
+
+- name: External Huawei Cloud Controller | check external_huaweicloud_region value
+  fail:
+    msg: "external_huaweicloud_region is missing"
+  when: external_huaweicloud_region is not defined or not external_huaweicloud_region
+
+
+- name: External Huawei Cloud Controller | check external_huaweicloud_project_id value
+  fail:
+    msg: "one of external_huaweicloud_project_id must be specified"
+  when:
+    - external_huaweicloud_project_id is not defined or not external_huaweicloud_project_id