chore: better error message when iOS version requested not present

[brainbicycle]

thanks for the orb!

Adds a slightly more helpful error message in the event that the requested iOS version is not installed on the ci machine. Used the function that already exists for a similar purpose as a guideline.

job here failed due to requesting 17.0 when not available: https://app.circleci.com/pipelines/github/artsy/eigen/48271/workflows/cb429968-2f28-4859-bb6e-f54227923dcf/jobs/165451
with error:

jq: error (at <stdin>:2499): Cannot iterate over null (null)
Exited with code exit status 5

instead fail with something like:

ERROR!: Simulator runtime not found
Requested: Simulator Runtime: iOS-18-3
Available Runtimes:
com.apple.CoreSimulator.SimRuntime.iOS-12-4
com.apple.CoreSimulator.SimRuntime.iOS-13-7
com.apple.CoreSimulator.SimRuntime.iOS-14-2
com.apple.CoreSimulator.SimRuntime.iOS-16-4

[brainbicycle]

@BytesGuy sorry for ping but I can't assign reviewers so thought it may have been missed

[bdellegrazie]

@brainbicycle just FYI, I believe you can close this PR as they have implemented something similar but in a slightly different way.

[brainbicycle]

alright thanks for the update!

[brainbicycle]

hmmm this error message is still pretty opaque unless I am missing something: https://app.circleci.com/pipelines/github/artsy/eigen/62319/workflows/578f31e5-af6f-4c4c-a504-5b6f6c4ab39c/jobs/215539

[stianjensen]

hmmm this error message is still pretty opaque unless I am missing something: https://app.circleci.com/pipelines/github/artsy/eigen/62319/workflows/578f31e5-af6f-4c4c-a504-5b6f6c4ab39c/jobs/215539

Agreed, observing the same now while trying to update to Xcode 16. Would be very helpful with some information on which version is not available, and what versions actually are. Found this PR while googling the cryptic error message.