[utils] update how auto-updated tests are displayed when the test is retried (#181097)

This changes how test updater output is displayed to make it less
confusing for tests with ALLOW_RETRIES. Previously it was merged into
the output string for the test result, but that hides it in many less
verbose modes, so now it's displayed separately. The FIXED status is
added, which is the same as FLAKYPASS except it highlights that a test
was auto-updated before it passed.

From PR https://github.com/llvm/llvm-project/pull/181097

GitOrigin-RevId: 358b1d597ad4a418bb6eda1770b0ee4deeca7687