Randomize the download archive name the installer extracts/executes

[zorgiepoo]

Randomize the download archive name the installer extracts/executes for better security hardening.

Misc Checklist

• [ ] My change requires a documentation update on Sparkle's website repository
• [ ] My change requires changes to generate_appcast, generate_keys, or sign_update

Testing

I tested and verified my change by using one or multiple of these methods:

• [x] Sparkle Test App
• [ ] Unit Tests
• [x] My own app
• [ ] Other (please specify)

Need to test:

• [x] UUID string is not the same on subsequent runs
• [x] zip archives
• [x] tar archives
• [x] dmg archives
• [x] pkg updates
• [x] delta updates
• [x] older OS systems

macOS version tested: 14.5 (23F79) 10.14.6 VM