ProjectionBehaviorSpec: must work with ProjectionManagement extension

This test appears to be flaky:

```
<-- [org.apache.pekko.projection.ProjectionBehaviorSpec: A ProjectionBehavior must work with ProjectionManagement extension] End of log messages of test that [Failed(java.lang.AssertionError: Received unexpected message StopObserved)]
[info] ProjectionBehaviorSpec:
[info] A ProjectionBehavior
[info] - must start immediately on demand (734 milliseconds)
[info] - must stop after receiving stop message (103 milliseconds)
[info] - must stop after stopping actor without stop message (28 milliseconds)
[info] - must also stop when stopping underlying stream results in failure (7 milliseconds)
[info] - must provide access to current offset (38 milliseconds)
[info] - must support update of current offset (59 milliseconds)
[info] - must handle offset operations sequentially (309 milliseconds)
[info] - must support pause/resume (11 milliseconds)
[info] - must handle pause/resume operations sequentially (9 milliseconds)
[info] - must work with ProjectionManagement extension *** FAILED *** (1 second, 456 milliseconds)
[info] java.lang.AssertionError: Received unexpected message StopObserved
[info] at org.apache.pekko.actor.testkit.typed.internal.TestProbeImpl.assertFail(TestProbeImpl.scala:410)
[info] at org.apache.pekko.actor.testkit.typed.internal.TestProbeImpl.expectNoMessage_internal(TestProbeImpl.scala:224)
[info] at org.apache.pekko.actor.testkit.typed.internal.TestProbeImpl.expectNoMessage(TestProbeImpl.scala:218)
[info] at org.apache.pekko.projection.ProjectionBehaviorSpec.$anonfun$new$15(ProjectionBehaviorSpec.scala:502)
[info] at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[info] at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
[info] at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
[info] at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
[info] at org.scalatest.Transformer.apply(Transformer.scala:22)
[info] at org.scalatest.Transformer.apply(Transformer.scala:20)
[info] at org.scalatest.wordspec.AnyWordSpecLike$$anon$3.apply(AnyWordSpecLike.scala:1239)
[info] at org.apache.pekko.actor.testkit.typed.scaladsl.LogCapturing.withFixture(LogCapturing.scala:79)
[info] at org.apache.pekko.actor.testkit.typed.scaladsl.LogCapturing.withFixture$(LogCapturing.scala:77)
[info] at org.apache.pekko.projection.ProjectionBehaviorSpec.withFixture(ProjectionBehaviorSpec.scala:214)
[info] at org.scalatest.wordspec.AnyWordSpecLike.invokeWithFixture$1(AnyWordSpecLike.scala:1237)
[info] at org.scalatest.wordspec.AnyWordSpecLike.$anonfun$runTest$1(AnyWordSpecLike.scala:1249)
[info] at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
[info] at org.scalatest.wordspec.AnyWordSpecLike.runTest(AnyWordSpecLike.scala:1249)
[info] at org.scalatest.wordspec.AnyWordSpecLike.runTest$(AnyWordSpecLike.scala:1231)
[info] at org.apache.pekko.projection.ProjectionBehaviorSpec.runTest(ProjectionBehaviorSpec.scala:214)
[info] at org.scalatest.wordspec.AnyWordSpecLike.$anonfun$runTests$1(AnyWordSpecLike.scala:1308)
[info] at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:413)
[info] at scala.collection.immutable.List.foreach(List.scala:431)
[info] at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
[info] at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:390)
[info] at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:427)
[info] at scala.collection.immutable.List.foreach(List.scala:431)
[info] at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
[info] at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:396)
[info] at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:475)
[info] at org.scalatest.wordspec.AnyWordSpecLike.runTests(AnyWordSpecLike.scala:1308)
[info] at org.scalatest.wordspec.AnyWordSpecLike.runTests$(AnyWordSpecLike.scala:1307)
[info] at org.apache.pekko.projection.ProjectionBehaviorSpec.runTests(ProjectionBehaviorSpec.scala:214)
[info] at org.scalatest.Suite.run(Suite.scala:1114)
[info] at org.scalatest.Suite.run$(Suite.scala:1096)
[info] at org.apache.pekko.actor.testkit.typed.scaladsl.ScalaTestWithActorTestKit.org$scalatest$BeforeAndAfterAll$$super$run(ScalaTestWithActorTestKit.scala:41)
[info] at org.scalatest.BeforeAndAfterAll.liftedTree1$1(BeforeAndAfterAll.scala:213)
[info] at org.scalatest.BeforeAndAfterAll.run(BeforeAndAfterAll.scala:210)
[info] at org.scalatest.BeforeAndAfterAll.run$(BeforeAndAfterAll.scala:208)
[info] at org.apache.pekko.projection.ProjectionBehaviorSpec.org$scalatest$wordspec$AnyWordSpecLike$$super$run(ProjectionBehaviorSpec.scala:214)
[info] at org.scalatest.wordspec.AnyWordSpecLike.$anonfun$run$1(AnyWordSpecLike.scala:1353)
[info] at org.scalatest.SuperEngine.runImpl(Engine.scala:535)
[info] at org.scalatest.wordspec.AnyWordSpecLike.run(AnyWordSpecLike.scala:1353)
[info] at org.scalatest.wordspec.AnyWordSpecLike.run$(AnyWordSpecLike.scala:1351)
[info] at org.apache.pekko.projection.ProjectionBehaviorSpec.run(ProjectionBehaviorSpec.scala:214)
[info] at org.scalatest.tools.Framework.org$scalatest$tools$Framework$$runSuite(Framework.scala:321)
[info] at org.scalatest.tools.Framework$ScalaTestTask.execute(Framework.scala:517)
[info] at sbt.TestRunner.runTest$1(TestFramework.scala:153)
[info] at sbt.TestRunner.run(TestFramework.scala:168)
[info] at sbt.TestFramework$$anon$3$$anonfun$$lessinit$greater$1.$anonfun$apply$1(TestFramework.scala:336)
[info] at sbt.TestFramework$.sbt$TestFramework$$withContextLoader(TestFramework.scala:296)
[info] at sbt.TestFramework$$anon$3$$anonfun$$lessinit$greater$1.apply(TestFramework.scala:336)
[info] at sbt.TestFramework$$anon$3$$anonfun$$lessinit$greater$1.apply(TestFramework.scala:336)
[info] at sbt.TestFunction.apply(TestFramework.scala:348)
[info] at sbt.Tests$.$anonfun$toTask$1(Tests.scala:436)
[info] at sbt.std.Transform$$anon$3.$anonfun$apply$2(Transform.scala:47)
[info] at sbt.std.Transform$$anon$4.work(Transform.scala:69)
[info] at sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[info] at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[info] at sbt.Execute.work(Execute.scala:292)
[info] at sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[info] at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:[265](https://github.com/apache/incubator-pekko-projection/actions/runs/7831923269/job/21369593583?pr=105#step:6:266))
[info] at sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[info] at java.util.concurrent.FutureTask.run(FutureTask.java:[266](https://github.com/apache/incubator-pekko-projection/actions/runs/7831923269/job/21369593583?pr=105#step:6:267))
[info] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[info] - failureInsideProjectionPropagatesToTestkit
[info] at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[info] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[info] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[info] at java.lang.Thread.run(Thread.java:750)
```

Start with ProjectionBehaviorSpec, especially the ProjectionManagement test around line 502, and run that test repeatedly to reproduce the unexpected StopObserved message. Trace the test's timing and message expectations; done means the test reliably passes without receiving an unexpected StopObserved.

Written by the indexing model from the issue text.