[feature request] C++ and Python client consumer add epoch.

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### Motivation

[PIP-84](https://github.com/apache/pulsar/wiki/PIP-84-:-Pulsar-client:-Redeliver-command-add-epoch)

### Solution

Refer PR: https://github.com/apache/pulsar/pull/10478

### Alternatives

_No response_

### Anything else?

Need to write unit tests first to prove the problems mentioned in PIP, then prove that the problem can be solved by adding epoch.

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Read PIP-84 and the referenced PR #10478 first; no source file or test path is named in the issue. Add focused unit coverage for the reported consumer problems and verify that the tests demonstrate epoch support resolves them.

Written by the indexing model from the issue text.