Delete flaky test

This test tried to verify that the full GCs were performed less than 5% of time for particular allocation pattern. The number of full GCs performed can be influenced by timing and other activity on the machine, that makes this test unreliable.

Related dotnet#103494
Fixes dotnet#100174
Fixes dotnet#99729

Author: jkotas

src/tests/GC/Regressions/v2.0-beta2/452950/452950.cs

@@ -3043,9 +3043,6 @@
         <ExcludeList Include = "$(XunitTestBinBase)/tracing/eventcounter/regression-25709/**">
             <Issue>https://github.com/dotnet/runtime/issues/84786</Issue>
         </ExcludeList>
-        <ExcludeList Include = "$(XunitTestBinBase)/GC/Regressions/v2.0-beta2/452950/452950/**">
-            <Issue>needs triage</Issue>
-        </ExcludeList>
         <ExcludeList Include = "$(XunitTestBinBase)/GC/Stress/Framework/ReliabilityFramework/**">
             <Issue>needs triage</Issue>
         </ExcludeList>