System.Collections tests failing on iOS, tvOS

[mdh1418]

Several tests from System.Collections fail on iOS and tvOS:

System.Collections.Immutable.Tests

• System.Collections.Immutable.Tests.ImmutableArrayTest.IStructuralEquatableGetHashCode

System_Collections_Immutable_Tests_failures.txt

System.Collections.Immutable.Tests.dll   Failed: 1

Test collection for System.Collections.Immutable.Tests.ImmutableArrayTest
System.Collections.Immutable.Tests.ImmutableArrayTest.IStructuralEquatableGetHashCode
    System.InvalidOperationException : No data found for System.Collections.Immutable.Tests.ImmutableArrayTest.IStructuralEquatableGetHashCode

Updated with #49917

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