BinaryFormatterTests.SerializeHugeObjectGraphs hangs on ppc64le

[akoeplinger]

As seen on CI:

 Discovering: System.Runtime.Serialization.Formatters.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Runtime.Serialization.Formatters.Tests (found 70 of 78 test cases)
  Starting:    System.Runtime.Serialization.Formatters.Tests (parallel test collections = on, max threads = 2)
    System.Runtime.Serialization.Formatters.Tests.DisableBitTests.DisabledAlwaysInBrowser [SKIP]
      Condition(s) not met: "IsBinaryFormatterSuppressedOnThisPlatform"
   System.Runtime.Serialization.Formatters.Tests: [Long Running Test] 'System.Runtime.Serialization.Formatters.Tests.BinaryFormatterTests.SerializeHugeObjectGraphs', Elapsed: 00:02:11
   System.Runtime.Serialization.Formatters.Tests: [Long Running Test] 'System.Runtime.Serialization.Formatters.Tests.BinaryFormatterTests.SerializeHugeObjectGraphs', Elapsed: 00:04:11
   System.Runtime.Serialization.Formatters.Tests: [Long Running Test] 'System.Runtime.Serialization.Formatters.Tests.BinaryFormatterTests.SerializeHugeObjectGraphs', Elapsed: 00:06:11
   System.Runtime.Serialization.Formatters.Tests: [Long Running Test] 'System.Runtime.Serialization.Formatters.Tests.BinaryFormatterTests.SerializeHugeObjectGraphs', Elapsed: 00:08:11
   System.Runtime.Serialization.Formatters.Tests: [Long Running Test] 'System.Runtime.Serialization.Formatters.Tests.BinaryFormatterTests.SerializeHugeObjectGraphs', Elapsed: 00:10:11
   System.Runtime.Serialization.Formatters.Tests: [Long Running Test] 'System.Runtime.Serialization.Formatters.Tests.BinaryFormatterTests.SerializeHugeObjectGraphs', Elapsed: 00:12:11
   System.Runtime.Serialization.Formatters.Tests: [Long Running Test] 'System.Runtime.Serialization.Formatters.Tests.BinaryFormatterTests.SerializeHugeObjectGraphs', Elapsed: 00:14:11
Killed
['System.Runtime.Serialization.Formatters.Tests' END OF WORK ITEM LOG: Command timed out, and was killed]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[akoeplinger]

@alhad-deshpande filing this so we have a tracking issue, I'll disable the test in the meantime with #75282