[Hotfix][Docs]Fixed document missing original (apache#10679)

https://github.com/apache/pulsar/runs/2644824512?check_suite_focus=true
```
Error: No 'original_id' field found in /pulsar/site2/website/versioned_docs/version-2.7.2/deploy-bare-metal-multi-cluster.md. Perhaps you forgot to add it when importing prior versions of your docs?
    at forEach (/pulsar/site2/website/node_modules/docusaurus/lib/server/versionFallback.js:64:11)
    at Array.forEach (<anonymous>)
    at Object.<anonymous> (/pulsar/site2/website/node_modules/docusaurus/lib/server/versionFallback.js:52:7)
    at Module._compile (internal/modules/cjs/loader.js:1068:30)
    at Module._compile (/pulsar/site2/website/node_modules/pirates/lib/index.js:99:24)
    at Module._extensions..js (internal/modules/cjs/loader.js:1097:10)
    at Object.newLoader [as .js] (/pulsar/site2/website/node_modules/pirates/lib/index.js:104:7)
    at Module.load (internal/modules/cjs/loader.js:933:32)
    at Function.Module._load (internal/modules/cjs/loader.js:774:14)
    at Module.require (internal/modules/cjs/loader.js:957:19)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
```

site2/website/versioned_docs/version-2.7.2/deploy-bare-metal-multi-cluster.md

@@ -1,7 +1,8 @@
 ---
-id: deploy-bare-metal-multi-cluster
+id: version-2.7.2-deploy-bare-metal-multi-cluster
 title: Deploying a multi-cluster on bare metal
 sidebar_label: Bare metal multi-cluster
+original_id: deploy-bare-metal-multi-cluster
 ---
 
 > ### Tips

site2/website/versioned_docs/version-2.7.2/deploy-bare-metal.md

@@ -1,7 +1,8 @@
 ---
-id: deploy-bare-metal
+id: version-2.7.2-deploy-bare-metal
 title: Deploy a cluster on bare metal
 sidebar_label: Bare metal
+original_id: deploy-bare-metal
 ---
 
 

site2/website/versioned_docs/version-2.7.2/getting-started-standalone.md

@@ -1,7 +1,8 @@
 ---
-id: standalone
+id: version-2.7.2-standalone
 title: Set up a standalone Pulsar locally
 sidebar_label: Run Pulsar locally
+original_id: standalone
 ---
 
 For local development and testing, you can run Pulsar in standalone mode on your machine. The standalone mode includes a Pulsar broker, the necessary ZooKeeper and BookKeeper components running inside of a single Java Virtual Machine (JVM) process.