Auto merge of #110177 - RalfJung:miri-tests, r=oli-obk

fix running Miri tests

This partially reverts rust-lang/rust#108659 to fix rust-lang/rust#110102: the Miri test runner does not support any flags, they are interpreted as filters instead which leads to no tests being run.

I have not checked any of the other test runners for whether they are having any trouble with these flags.

Cc `@pietroalbini` `@Mark-Simulacrum` `@jyn514`