Failures on [cfe] Move assignability checking for for-element conditions earlier.

[stereotype441]

There are new test failures on [cfe] Move assignability checking for for-element conditions earlier..

The tests

corelib/regexp/named_captures_test RuntimeError (expected Pass)

are failing on configurations

dart2wasm-linux-optimized-jsc

Although the CI system blames commit a7158eba814c932be0196efedfd7b5bcf7433ab5, looking at the history of this test (https://dart-ci.web.app/#showLatestFailures=false&test=corelib/regexp/named_captures_test&configurations=dart2wasm-linux-optimized-jsc), it has been failing consistently since January (see https://github.com/dart-lang/sdk/issues/54757). The only reason it's showing up as a failure now is because on October 2, the test infrastructure reclassified the test as flaky, and then today it dropped that classification and the test went back to failing.

[dart-github-bot]

Summary: The corelib/regexp/named_captures_test test is failing on the dart2wasm-linux-optimized-jsc configuration. While the CI system blames a recent commit, the test has been failing consistently since January and was only recently reclassified as flaky.