database/gdb：improve gdb trace for sql

[houseme]

Description

SQL 数据的统计依据是 Tagkey db.statement,例如: tracer.activeSpan.setTag("db.statement", "SELECT*FROM wuser _table");,

统一使用官方推荐的tagKey 存储运行的sql记录，移除trace events中的重复记录。

https://github.com/open-telemetry/semantic-conventions/blob/main/docs/database/sql.md

https://github.com/open-telemetry/semantic-conventions/blob/3b6ffe3e810e965d122c19fdcc07212a2ec854b7/CHANGELOG.md?plain=1#L935

https://github.com/open-telemetry/semantic-conventions/blob/3b6ffe3e810e965d122c19fdcc07212a2ec854b7/CHANGELOG.md?plain=1#L14

open-telemetry/semantic-conventions#716

open-telemetry/opentelemetry-go#5476