Build error with Go 1.23.8 on darwin/arm64: "package iter is not in std" in proto/col_arr_go123.go

**Environment:**
* Go Version: `go1.23.8 darwin/arm64`
* `github.com/ClickHouse/ch-go` version: `v0.66.0` (and later versions pulled as a dependency by `github.com/ClickHouse/clickhouse-go/v2@v2.35.0` or `@latest`)
* Operating System: macOS (darwin/arm64)

**Observed Behavior:**
When attempting to build a project that depends on `github.com/ClickHouse/clickhouse-go/v2` (which in turn depends on `ch-go`), the build fails with the following error:

This error occurs because the file `proto/col_arr_go123.go` within the `ch-go` module, which is compiled due to the `//go:build go1.23` build tag, attempts to `import "iter"`.

**File content (`proto/col_arr_go123.go` in `ch-go@v0.66.0`):**
```go
//go:build go1.23

package proto

import "iter"

// RowRange returns a [iter.Seq] iterator over i-th row.
func (c ColArr[T]) RowRange(i int) iter.Seq[T] {
var start int
end := int(c.Offsets[i])
if i > 0 {
start = int(c.Offsets[i-1])
}

return func(yield func(T) bool) {
for idx := start; idx < end; idx++ {
if !yield(c.Data.Row(idx)) {
return
}
}
}
}
```