Fix some issues building for Library Evolution, Xcode 16

[gemmakbarlow]

• Fixes some issues building for Library Evolution, Xcode 16
• Adds Makefile targets used to create the error state prior to fixing them
• Adds Makefile target build-for-library-evolution to CI

[gemmakbarlow]

@stephencelis - this should be the last in the series from me 😄

[gemmakbarlow]

I also took a stab at updating CI to address the error from the previous run (not finding the 17.5 simulator with Xcode 16 selected IIRC). Let me know what you think; a couple of ways to do this.

[gemmakbarlow]

Noting that this is working for me locally @stephencelis - might be worth a re-run.

[gemmakbarlow]

@stephencelis - what do you think about giving this one a re-rerun, given it's working for me locally ? (I don't have that button available in the UI).

[stephencelis]

@gemmakbarlow I've been re-running but sadly GitHub actions just seem to be flakey. Here's hoping for a green run this time!

[stephencelis]

@gemmakbarlow Sorry for the churn. I'm frustrated with CI and I think some of the changes I've made to your PR have made things worse in how the simulator is getting resolved. I'm not sure if you want to take another stab at fixing things, or if you want me to try again when I have time.

[gemmakbarlow]

All good - I can take a stab at fixing it, hopefully later tonight.