For debugging and bug-finding workflows on Darwin, support
launching processes with memory tagging for binaries that are
not entitled.
This will cause the process to behave as if the binary was entitled
with:
```
<key>com.apple.security.hardened-process.checked-allocations</key>
<true/>
```
This has no effect on hardware without MTE support.
---------
Co-authored-by: Jonas Devlieghere <jonas@devlieghere.com>