chore: bump Jenkins Core to 2.401.3

[kuisathaverat]

chore: bump Jenkins Core to 2.401.3

[kuisathaverat]

Verify this issue is fixed #775

[kuisathaverat]

java.lang.AssertionError: 

Expected: is "jenkins-core"
     but: was "ant"
	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
	at io.jenkins.plugins.opentelemetry.BaseIntegrationTest.assertBuildStepMetadata(BaseIntegrationTest.java:237)
	at io.jenkins.plugins.opentelemetry.JenkinsOtelPluginFreestyleIntegrationTest.testFreestyleJob_with_ant_plugin(JenkinsOtelPluginFreestyleIntegrationTest.java:204)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.jvnet.hudson.test.JenkinsRule$1.evaluate(JenkinsRule.java:655)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.lang.Thread.run(Thread.java:829)

[cyrille-leclerc]

@kuisathaverat I fixed the build with:

• Remove workaround as Jenkins now better support unit tests of freestyle jobs #780

[kuisathaverat]

superseded by #781