QueryContext not supported in prepared statement in SQL driver compatibility

### Describe the bug

When executing a prepared query statement, the SQL client returns `only Exec method supported in batch mode`.

### Steps to reproduce
1. `docker run --name clickhouse -p 9000:9000 -e ALLOW_EMPTY_PASSWORD=yes bitnami/clickhouse`
2. wait for container to startup
3. `go run main.go`

### Expected behaviour

Query is executed and rows are returned without an error.

### Code example
```go
package main

import (
"context"
"database/sql"
"fmt"
"log"

_ "github.com/ClickHouse/clickhouse-go/v2"
)

func main() {
db, err := sql.Open("clickhouse", "clickhouse://default@127.0.0.1:9000")
if err != nil {
log.Fatalf("opening database failed: %v", err)
}
defer db.Close()

ctx := context.Background()
if err := db.PingContext(ctx); err != nil {
log.Printf("pinging server failed: %v", err)
}

stmt, err := db.PrepareContext(ctx, "SELECT * FROM system.metrics")
if err != nil {
log.Fatalf("preparing statement failed: %v", err)
}

rows, err := stmt.QueryContext(ctx)
if err != nil {
log.Fatalf("executing preparing statement failed: %v", err)
}
columns, err := rows.Columns()
fmt.Println("row columns:", columns)
fmt.Println("err:", err)
}
```

### Configuration
#### Environment
* Client version: 2.18.0
* Language version: Golang
* OS: Linux/AMD64
* Interface: ClickHouse database/sql compatible driver

#### ClickHouse server
* ClickHouse Server version: tested with 22.x, 23.8 and latest

Reproduce the issue with the provided ClickHouse Docker command and go run main.go, then inspect the database/sql compatibility path around PrepareContext and QueryContext. The work is done when the prepared query returns rows without the batch-mode error; the payload does not name a specific file or regression test.

Written by the indexing model from the issue text.