Revert: macOS hashFiles workaround

[AnthonyRonning]

We implemented a workaround in PR #320 to bypass a GitHub Actions runner bug on macOS where hashFiles was failing with 'The template is not valid'.

Workaround Implemented:
Replaced hashFiles cache keys with static keys (v1) in:

• mobile-build.yml
• desktop-build.yml
• testflight-on-comment.yml
• release.yml

Action Required:
Once the upstream issue is resolved, revert the changes to restore dynamic caching based on lockfiles.

Upstream Issue:
actions/runner-images#13341