The focus of this commit is to store the dSYM files associated with
official macOS builds. dSYM files allow us to map crash reports to
source.
The dSYM files are primarily uploaded to our official blob storage where
all releases are also stored. We also upload the dSYM files to Sentry
since I'm experimenting with using that for crash reproting (note:
manual crash reporting, no automatic network traffic).
This commit also changes our blob URLs for releases to use the full
Git SHA rather than a build number. This is much easier to trace back.
