Adjust version parsing in release scripts, fix release dry runs in CI (#43568)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/43568

Fixes to restore passing CI checks on main after D55027120.

- Widen validation checks in version utils to accept `0.x.x` (as opposed to `0.[not-'0'].x`).
- Use `tag: test` instead of `tag: latest` for dry run job params.

Changelog: [Internal]

Reviewed By: cortinico

Differential Revision: D55123739

fbshipit-source-id: 9f76dced4e7aa3ce87d6680cd7687ae443305331