The situation of the mount point being unmounted after an unsuccessful
detach attempt leads to an unrecoverable situation. Instead of
optimistically continuing, the script has to fail.
As not only detaching but apparently all operations of hdiutil can be
blocked by slow disk I/O on CI runners, this wraps all invocations of
it in a helper function that attempts up to 5 retries with a backoff
timer.
* Add provisioning profile support for macOS builds
* Fix internal variable names in macOS packaging script
* Add fallback git reference for validator actions
* Add required repository environment to documention deployment jobs
* Pass GitHub pull request number to GitHub CLI explicitly
* Use shortened commit hash for Steam nightly versions
* Ensure that concurrency check for tagged push uses a boolean value
* Update disk image creation function to retry ejection on CI
* Fix repository checkout in Flatpak publish action
* Fix output paths and filenames of generated appcast XML files
* Limit notice about notarization password use to non-CI usage
* Remove architecture-specific suffix from appcast artifact name
