Extract plugin-specific examples to plugin directories (#10228)

* move alicloud examples from common example directory to alicloud builder

* move amazon examples to amazon builder dir

* move examples into ansible provisioner directory

* move azure examples to builder dir

* move hyperone examples into builder directory

* move jdcloud builder examples into builder directory

* move tencent cloud examples into the builder directory

* move ucloud examples into ucloud builder directory

builder/ucloud/examples/basic.json

@@ -0,0 +1,38 @@
+{
+  "variables": {
+    "ucloud_public_key": "{{env `UCLOUD_PUBLIC_KEY`}}",
+    "ucloud_private_key": "{{env `UCLOUD_PRIVATE_KEY`}}",
+    "ucloud_project_id": "{{env `UCLOUD_PROJECT_ID`}}"
+  },
+  "builders": [
+    {
+      "type": "ucloud-uhost",
+      "public_key": "{{user `ucloud_public_key`}}",
+      "private_key": "{{user `ucloud_private_key`}}",
+      "project_id": "{{user `ucloud_project_id`}}",
+      "region": "cn-bj2",
+      "availability_zone": "cn-bj2-02",
+      "instance_type": "n-basic-2",
+      "source_image_id": "uimage-f1chxn",
+      "ssh_username": "root",
+      "image_name": "packer-test-basic-bj",
+      "image_copy_to_mappings": [
+        {
+          "project_id": "{{user `ucloud_project_id`}}",
+          "region": "cn-sh2",
+          "description": "test",
+          "name": "packer-test-basic-sh"
+        }
+      ]
+    }
+  ],
+  "provisioners": [
+    {
+      "type": "shell",
+      "inline": [
+        "yum install -y nginx"
+      ]
+    }
+  ]
+}
+