Support `overwrite` option in RegisterTable
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enhancement
- Dominant language
- Java
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Description
### Is your feature request related to a problem? Please describe.
From a slack [discussion](https://apache-polaris.slack.com/archives/C084QSKD6S2/p1761327874167969?thread_ts=1761326421.638729&cid=C084QSKD6S2)
IRC spec added an `overwrite` option for [registerTable](https://github.com/apache/iceberg/blob/6b86a75d3a0f0123d1a19f2db0b266bef05c2a5b/open-api/rest-catalog-open-api.yaml#L3543-L3543)
This will enable use case where updating the entire metadata is needed.
It would be good for polaris to support this to remain compliant with IRC spec
### Describe the solution you'd like
_No response_
### Describe alternatives you've considered
_No response_
### Additional context
_No response_
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