[feature request] Support consumer client memory limit

### Motivation

The current CPP client supports memory limits by the client.

https://github.com/apache/pulsar-client-cpp/blob/872f8abaade7ecd346d3f59e2f6b3901c65ef7de/include/pulsar/ClientConfiguration.h#L36-L42

But this configuration does not limit the consumer's memory usage, We need to support consumer memory control first and use this parameter control uniformly.

### Alternatives

Refer to PIP: https://github.com/apache/pulsar/pull/15216
Refer to comment: https://github.com/apache/pulsar/pull/16903#pullrequestreview-1058047687

After this, we can control the memory limit through the client config.

### Anything else?

從 include/pulsar/ClientConfiguration.h 中的用戶端記憶體限制設定開始，接著閱讀所引用的 Pulsar PIP，以及關於提議方法的 pull request 討論。追蹤消費者記憶體的管理方式，並將完成定義為：用戶端設定能一致地控制消費者的記憶體使用量，且測試涵蓋此限制。

由索引模型根據 Issue 內容生成。