[bazel] Eliminate the use of `new_rules` in dvsim configs

We are using the flag `new_rules` in dvsim `hjson` files to indicate to DV test benches that certain test programs are being built with the new bazel rules and do not use the `opentitan_functest` naming conventions.

After all of the rules are converted, the older naming convention will be obsolete and the `new_rules` flag can be eliminated.

Search the dvsim HJSON configurations for the `new_rules` flag and inspect the related Bazel rule conversion state. Confirm that the older `opentitan_functest` naming convention is no longer needed, then remove the flag and verify that DV test benches still build and run without it.

Written by the indexing model from the issue text.