Replace sh scripts with tested JS scripts to release template

[blakef]

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Summary

The previous scripts to trigger the @react-native-communty/template release workflow has not been working. This is a rewrite is js, along with some testing to make this more robust.

Test Plan

1. Unit tests
2. Once the infrastructure lands in the @react-native-community/template workflow, we can trigger a dry run.

TODO:

• Still needs to be used in the GH release workflow.
• Template release workflow needs to land the dry_run input change.

Changelog: [Internal]