chore(test, release): nightly snapshot release and upgrade testing

[justinthelaw]

Description

As part of compliance with the Made for UDS requirements, upgrade testing must be implemented separately from E2E functional/performance tests. Upgrade tests consist of an installation of a previous bundle version, performing a deployment of the newer "snapshot" bundle, and then running all E2E tests against the upgraded bundle.

This PR also implements a snapshot release, allowing for the separation of the creation of a dev bundle from the testing workflow. This allows for graceful handling of build errors (stop early, re-run) and aligns us with OSS/best practice standards for producing frequent releases for testing. As part of this implementation, releases are now a modular action that accepts two inputs, release tag and sub-repo.

NOTE: the nightly takes about 3 hours to complete - that's 3 hours of large runner costs

BREAKING CHANGES

• N/A

CHANGES

• adds an upgrade test that runs nightly against the last tagged release and the current commit on main
• adds a snapshot release workflow that runs nightly using the current commit on main
• refactors release to be a modular action used by release and nightly-snapshot-release

Related Issue

Relates to #702

Checklist before merging

• Tests, documentation, ADR added or updated as needed
• Followed the Contributor Guide Steps

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