chore(deps): bump gorm.io/driver/mysql from 1.4.5 to 1.5.6 in /tests

Bumps [gorm.io/driver/mysql](https://github.com/go-gorm/mysql) from 1.4.5 to 1.5.6.
- [Commits](go-gorm/mysql@v1.4.5...v1.5.6)

---
updated-dependencies:
- dependency-name: gorm.io/driver/mysql
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

tests/go.mod

@@ -4,13 +4,12 @@ go 1.16
 
 require (
 	github.com/mattn/go-sqlite3 v1.14.16 // indirect
-	golang.org/x/tools v0.5.0 // indirect
-	gorm.io/driver/mysql v1.4.5
+	gorm.io/driver/mysql v1.5.6
 	gorm.io/driver/sqlite v1.4.4
 	gorm.io/gen v0.3.19
-	gorm.io/gorm v1.24.3
+	gorm.io/gorm v1.25.7
 	gorm.io/hints v1.1.1 // indirect
-	gorm.io/plugin/dbresolver v1.4.0
+	gorm.io/plugin/dbresolver v1.5.0
 )
 
 replace gorm.io/gen => ../