Add triggering test for GC.AddMemoryPressure/GC.RemoveMemoryPressure

[AaronRobinsonMSFT]

The underlying GC.AddMemoryPressure/GC.RemoveMemoryPressure implementations were updated in #36767. The existing testing was questionable already and does nothing for this other algorithm. Deferring adding equivalent testing for now since this code path is not new but has been around since .NET Framework.

runtime/src/coreclr/tests/src/GC/API/GC/AddMemoryPressureTest.cs

Lines 136 to 159 in 4eaccd6

	public bool StressTest()
	{
	TestCount++;
	Console.WriteLine("StressTest Started...");
	int gcCount1 = createDummies(true);
	int gcCount2 = createDummies(false);
	Console.WriteLine("{0} {1}", gcCount1, gcCount2);
	if (gcCount1 > gcCount2)
	{
	Console.WriteLine("StressTest Passed");
	Console.WriteLine();
	return true;
	}
	Console.WriteLine("StressTest Failed");
	Console.WriteLine();
	return false;
	}

/cc @VSadov

Tagging subscribers to this area: @Maoni0
Notify danmosemsft if you want to be subscribed.

[mangod9]

Moving to 7 since this is not a blocker.