[Subtask] Add Partition APIs in Gravitino Python client

[xunliu]

Describe the subtask

Add these Python function interfaces into Gravitino Python client, reference to the document for the API descriptions.

• listPartitions(...): https://datastrato.ai/docs/0.4.0/api/rest/list-partitions
• addPartition(...): https://datastrato.ai/docs/0.4.0/api/rest/add-partitions
• getPartition(...): https://datastrato.ai/docs/0.4.0/api/rest/get-partition

We can reference the Gravitino JAVA client implementation, RelationalTable.java

Parent issue

#2113

[arnoldmr01]

Hi @xunliu I'm interested in this issue. May I take it if it's still available?

[arnoldmr01]

Is this issue only about adding interfaces for these three functions, or is the actual implementation needed as well?