Object.hasOwn has shipped since 9.3.

Also drive-by removing other removed feature flags from test262 config.

Bug: chromium:1213927, v8:13220
Change-Id: I3d11298e1348adf5b26d63a23a6606a4ad22892c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3863807
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82853}