Gradle: Bump org.testng:testng from 7.8.0 to 7.11.0

Bumps [org.testng:testng](https://github.com/testng-team/testng) from 7.8.0 to 7.11.0.
- [Release notes](https://github.com/testng-team/testng/releases)
- [Changelog](https://github.com/testng-team/testng/blob/master/CHANGES.txt)
- [Commits](testng-team/testng@7.8.0...7.11.0)

---
updated-dependencies:
- dependency-name: org.testng:testng
  dependency-version: 7.11.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -66,7 +66,7 @@ val commonsCsvVersion = "1.14.1"
 val apiValidationVersion = "3.1.1"
 val kubernetesClientVersion = "22.0.0"
 val orgJsonVersion = "20250517"
-val testNgVersion = "7.8.0"
+val testNgVersion = "7.11.0"
 val testContainersRedisVersion = "1.6.4"
 val testContainersPostgreSQLVersion = "1.21.3"
 val testContainersLocalStackVersion = "1.21.3"