BigTable does not support querying Materialized Views via the ReadRows API

### Determine this is the right repository

- [x] I determined this is the correct repository in which to report this feature request.

### Summary of the feature request

I would like to be able to run operations like ReadRows, SampleRowKeys, etc. on materialized views in Bigtable.

### Desired code experience

_No response_

### Expected results

_No response_

### API client name and version

google-cloud-bigtable 2.38

### Use case

SMRK would be helpful on a CMV for us, when we do async background data processing while using the CMV as a job queue

### Additional context

Proposed PR: https://github.com/googleapis/google-cloud-python/pull/17676

Review the proposed pull request first, then trace the Bigtable client paths for ReadRows and SampleRowKeys. Confirm that these operations support materialized views, including the SMRK use case described in the issue.

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