[MT][browser] Disabling tests failing in the last two weeks on MT.

[ilonatommy]

Continuation of #93224.

Why do we remove test disabling and increase the thread for it instead:
Failure of type: #91549 is caused by too small thread pool size in the browser, so we could avoid it by increasing it.

 System.Threading.Tasks.TaskSchedulerException : An exception was thrown by a TaskScheduler.
info: ---- System.Threading.ThreadStartException : Thread failed to start.
info: -------- System.ExecutionEngineException : mono_thread_platform_create_thread() failed
info:    at System.Threading.Tasks.Task.ScheduleAndStart(Boolean needsProtection)
info:    at System.Threading.Tasks.Task.Start(TaskScheduler scheduler)
info:    at System.Threading.Tasks.Task.Start()
info:    at System.Threading.Tasks.Tests.TaskPropertiesTests.TaskOptionTest(Boolean runSync)
info:    at System.Threading.Tasks.Tests.TaskPropertiesTests.TaskOptionsTestAsync()
info:    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
info:    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
info: ----- Inner Stack Trace -----
info:    at System.Threading.Thread.ThrowThreadStartException(Exception ex)
info:    at System.Threading.Thread.StartCore()
info:    at System.Threading.Thread.Start(Object parameter, Boolean captureContext, Boolean internalThread)
info:    at System.Threading.Thread.UnsafeStart(Object parameter)
info:    at System.Threading.Tasks.ThreadPoolTaskScheduler.QueueTask(Task task)
info:    at System.Threading.Tasks.TaskScheduler.InternalQueueTask(Task task)
info:    at System.Threading.Tasks.Task.ScheduleAndStart(Boolean needsProtection)
info: ----- Inner Stack Trace -----

[ghost]

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Issue Details

---

Continuation of #93224.

Author:	ilonatommy
Assignees:	-
Labels:	arch-wasm, disabled-test, area-VM-threading-mono
Milestone:	-

[ilonatommy]

/azp run runtime-wasm

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ilonatommy]

/azp run runtime-wasm

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ilonatommy]

/azp run runtime-wasm

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ilonatommy]

/azp run runtime-wasm

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[radical]

cc @pavelsavara for review of the property value change.