Writing UTC timestamp to an iceberg table fails

### Apache Iceberg Rust version

None

### Describe the bug

Writing UTC timestamp to an iceberg table fails in the arrow writer. [A discussion was had ](https://github.com/apache/arrow-rs/pull/9994) in arrow-rs if the logic should live there to slacken this and the suggestion was to handle this in application code similar to what datafusion does for this exact problem.

```
ArrowError(
"Incompatible type. Field 'timestamp' has type Timestamp(µs, \"+00:00\"), array has type Timestamp(µs, \"UTC\")",
),
```

### To Reproduce

_No response_

### Expected behavior

Don't fail, these two types are identical semantically

### Willingness to contribute

I can contribute a fix for this bug independently

Start in the Iceberg arrow writer where the incompatible timestamp types are rejected, then review the linked arrow-rs discussion and DataFusion's handling of the same problem. Confirm the expected behavior by reproducing a write with UTC timestamps and verify that Timestamp(µs, "UTC") and Timestamp(µs, "+00:00") are accepted as semantically equivalent.

Written by the indexing model from the issue text.