Fix - Under load and during topology changes, thread saturation can occur, causing a lockup #2503

Job	Run time
test-fast (tests/Proto.Actor.Tests/*.csproj)	1m 46s
build	1m 52s
test-slow (net8.0, tests/Proto.Cluster.Tests/*.csproj)	2m 37s
test-slow (net8.0, tests/Proto.Cluster.PartitionIdentity.Tests/*.csproj)	1m 4s
test-fast (tests/Proto.Remote.Tests/*.csproj)	1m 6s
test-slow (net8.0, tests/Proto.Cluster.RedisIdentity.Tests/*.csproj)	1m 17s
test-fast (tests/Proto.OpenTelemetry.Tests/*.csproj)	57s
test-slow (net8.0, tests/Proto.Cluster.PubSub.Tests/*.csproj)	1m 13s
test-fast (tests/Proto.Cluster.CodeGen.Tests/*.csproj)	26s
test-slow (net7.0, tests/Proto.Cluster.Tests/*.csproj)	2m 41s
test-slow (net7.0, tests/Proto.Cluster.PartitionIdentity.Tests/*.csproj)	1m 16s
test-slow (net7.0, tests/Proto.Cluster.RedisIdentity.Tests/*.csproj)	1m 30s
test-slow (net7.0, tests/Proto.Cluster.PubSub.Tests/*.csproj)	1m 20s
test-slow (net6.0, tests/Proto.Cluster.Tests/*.csproj)	2m 51s
test-slow (net6.0, tests/Proto.Cluster.PartitionIdentity.Tests/*.csproj)	1m 8s
test-slow (net6.0, tests/Proto.Cluster.RedisIdentity.Tests/*.csproj)	1m 25s
test-slow (net6.0, tests/Proto.Cluster.PubSub.Tests/*.csproj)	1m 14s
	25m 43s

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