This gets the test.yml workflow running and successfully uploading the coverate report to codecov. I'll leave it to subsequent PRs to tweak the codecov config to your liking.
get the tests running in test.yml; add make test
remove upload-codecov-report.yml as the upload is now done in test.yml; add .codecov.yml config file as a starting point
use slather to process the xcodebuild coverage report
update macos image in GHA and the iphone destination; fix IPHONEOS_DEPLOYMENT_TARGET to use the xcode default latest version
to avoid uploading build symbols from the test runs, add a new build config to the Xcode project named Test
This gets the test.yml workflow running and successfully uploading the coverate report to codecov. I'll leave it to subsequent PRs to tweak the codecov config to your liking.
make test