[lldb][test] enable reference storage types on linux.

rdar://71506440
(cherry picked from commit 97d0998)

Author: da-viper

lldb/test/API/lang/swift/reference_storage_types/TestSwiftReferenceStorageTypes.py

@@ -22,7 +22,6 @@
 class TestSwiftReferenceStorageTypes(TestBase):
     @decorators.skipIf(archs=['ppc64le']) #SR-10215
     @swiftTest
-    @skipIf(oslist=["linux"], bugnumber="rdar://76592966")
     def test_swift_reference_storage_types(self):
         """Test weak, unowned and unmanaged types"""
         self.build()