Warnings during JVM tests

Looks like caused by

```kotlin
@Ignore
class SingleToSingleTestsImpl
```

But they still run properly, I tried to fail check in `SingleToSingleTestsImpl` and test failed as expected.

https://github.com/badoo/Reaktive/actions/runs/4393344710/jobs/7693685167#step:7:1659

```
Unable to load JUnit4 runner to calculate Ignored test cases
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at org.gradle.api.internal.tasks.testing.junit.AllExceptIgnoredTestRunnerBuilder$FallbackJUnit4Builder.runnerForClass(AllExceptIgnoredTestRunnerBuilder.java:55)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:70)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:37)
at org.gradle.api.internal.tasks.testing.junit.IgnoredTestDescriptorProvider.getAllDescriptions(IgnoredTestDescriptorProvider.java:31)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestEventAdapter.processIgnoredClass(JUnitTestEventAdapter.java:140)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestEventAdapter.testIgnored(JUnitTestEventAdapter.java:129)
at org.junit.runner.notification.SynchronizedRunListener.testIgnored(SynchronizedRunListener.java:108)
at org.junit.runner.notification.RunNotifier$8.notifyListener(RunNotifier.java:209)
at org.junit.runner.notification.RunNotifier$SafeNotifier.run(RunNotifier.java:72)
at org.junit.runner.notification.RunNotifier.fireTestIgnored(RunNotifier.java:206)
at org.junit.internal.builders.IgnoredClassRunner.run(IgnoredClassRunner.java:16)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:108)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:57)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:39)
at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:52)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
at worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
at worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
```

Start with the JVM test run linked in the issue and the `SingleToSingleTestsImpl` class, especially its `@Ignore` annotation. Reproduce the warning and compare the ignored-class handling with the fact that the tests still execute. Done means the JVM test run no longer emits the JUnit4 runner warning while preserving the expected test behavior.

Written by the indexing model from the issue text.