Remove expected test failures for cond (#108709)
Remove the expected failure in def test_control_flow_tracing(self) by chaning the error message to `Expected pred to be bool or tensor, but got Proxy\(eq\)`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/108709
Approved by: https://github.com/ezyang, https://github.com/zou3519
ghstack dependencies: #107662, #107850
