Remove infra-staging from numfuzz builders and add
no-fail instead. Also remove the staging builders.

Bug: v8:11826
Cq-Include-Trybots: luci.v8.try:v8_numfuzz_dbg_ng,v8_numfuzz_ng,v8_numfuzz_tsan_ng
Change-Id: Icd7bc6275b5c78e38f0e75b5d133b3b7056f333e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3182233
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77142}