[Bug][Go SDK]: Xlang Bigquery IO doesn't appear to support Time type fields.

### What happened?

The cross language BigQuery IO doesn't appear to support time.Time type fields, preventing use in some pipelines. This should be confirmed via a test, fixed and the package documentation updated.

https://pkg.go.dev/github.com/apache/beam/sdks/v2/go/pkg/beam/io/xlang/bigqueryio

### Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

### Issue Components

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- [X] Component: IO connector
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