Bump testng from 7.3.0 to 7.4.0 (#7231)

Bumps [testng](https://github.com/cbeust/testng) from 7.3.0 to 7.4.0.
- [Release notes](https://github.com/cbeust/testng/releases)
- [Changelog](https://github.com/cbeust/testng/blob/master/CHANGES.txt)
- [Commits](testng-team/testng@7.3.0...7.4.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build.gradle

@@ -15,7 +15,7 @@ plugins {
 ext {
     reactiveStreamsVersion = "1.0.3"
     junitVersion = "4.13.2"
-    testNgVersion = "7.3.0"
+    testNgVersion = "7.4.0"
     mockitoVersion = "3.9.0"
     jmhLibVersion = "1.21"
     guavaVersion = "30.1.1-jre"