[FEATURE REQUEST] 'hoodie.datasource.write.precombine.field' only supports a single field

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**Describe the problem you faced**

Why does the configuration "hoodie.datasource.write.precombine.field" only support sorting on a single field? I think it is also possible to specify multiple fields for sorting

**To Reproduce**

Steps to reproduce the behavior:

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**Expected behavior**

A clear and concise description of what you expected to happen.

**Environment Description**

* Hudi version : 0.12.3

* Spark version : 3.2.3

* Hive version : 3.1.3

* Hadoop version : 3.3.0

* Storage (HDFS/S3/GCS..) : hdfs

* Running on Docker? (yes/no) : no

**Additional context**

Add any other context about the problem here.

**Stacktrace**

```Add the stacktrace of the error.```

The issue names only the hoodie.datasource.write.precombine.field configuration and provides no source file, test, reproduction steps, or acceptance criteria. Start by locating the configuration’s implementation and tests, then clarify the syntax and ordering semantics for multiple fields; done means the behavior is specified and covered by tests.

Written by the indexing model from the issue text.