[otelgorm] gorm turns on prepared statement, and metrics cannot be used

[shuqingzai]

When PrepareStmt: true is set in gorm, the assertion fails, resulting in the inability to use metrics

See: Caches Prepared Statement

source:

opentelemetry-go-extra/otelgorm/otelgorm.go

Line 58 in e41a0f2

if sqlDB, err := db.DB(); err == nil {