Support access more ufs in dora worker

[jffree]

Alluxio version Dora(3.x)

Is your feature request related to a problem? Please describe.

• Currently, only the ufs path specified by alluxio.dora.client.ufs.root configuration can be accessed on alluxio worker (dora architecture). If a path does not start with alluxio.dora.client.ufs.root path, it will be forced to add alluxio.dora.client.ufs.root as a prefix to access.

Describe the solution you'd like

1. When the accessed path does not have schema information, add the prefix according to alluxio.dora.client.ufs.root.
   1. set alluxio.dora.client.ufs.root=/tmp
   2. access a/b/c/d in client
   3. add prefix in dora worker like /tmp/a/b/c/d
   4. use root ufs client access /tmp/a/b/c/d
2. When the accessed path has schema information, build a new ufs client based on the schema information to access the path.
   1. set alluxio.dora.client.ufs.root=/tmp
   2. access hdfs://ns17/user/test/1.txx in client
   3. build hdfs ufs client in dora ufs (cache ufs client in dora worker)
   4. access hdfs://ns17/user/test/1.txx file by hdfs ufs client.

[dbw9580]

Thanks for the feature request. This is also what we want for the Dora architecture.

[maobaolong]

@bzheng888 Please keep an eye on this issue, it looks a good feature.

[github-actions[bot]]

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