Test case test_query_log always failed if backtrace not enabled

[Xuanwo]

Hi, I found these test cases always failed:

thread 'servers::http::http_query_handlers::test_query_log' panicked at 'QueryResponse { id: "7c5f2d8d-94d9-4f68-95c3-dd6945820e1c", session_id: Some("b4fb5312-27d5-4892-998b-600155bef3e8"), schema: Some(DataSchema { fields: [DataField { name: "query_text", data_type: String, nullable: false }, DataField { name: "exception_code", data_type: Int32, nullable: false }, DataField { name: "exception_text", data_type: String, nullable: false }, DataField { name: "stack_trace", data_type: String, nullable: false }], metadata: {} }), data: [[String("create table t1(a int)"), Number(2302), String("Code: 2302, displayText = Table 't1' already exists."), String("<disabled>")]], state: Succeeded, error: None, stats: QueryStats { scan_progress: Some(ProgressValues { rows: 5, bytes: 4667 }), running_time_ms: 45.224507 }, stats_uri: Some("/v1/query/7c5f2d8d-94d9-4f68-95c3-dd6945820e1c"), final_uri: Some("/v1/query/7c5f2d8d-94d9-4f68-95c3-dd6945820e1c/final"), next_uri: None, kill_uri: Some("/v1/query/7c5f2d8d-94d9-4f68-95c3-dd6945820e1c/kill") }', query/tests/it/servers/http/http_query_handlers.rs:474:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    servers::http::http_query_handlers::test_query_log

We want to check backtrace here, but we found a "<disabled>"

assert!(
    result.data[0][3]
        .as_str()
        .unwrap()
        .to_lowercase()
        .contains("backtrace"),
    "{:?}",
    result
);

Should we check this only when env RUST_BACKTRACE is set?

---

Asking code owner @youngsofun for help

[Xuanwo]

Addressed by PR #5440