Run RPI integration tests for LedBlinker

[thomas-bc]

Originating Project/Creator
Affected Component
Affected Architectures(s)
Related Issue(s)	#2102
Has Unit Tests (y/n)
Builds Without Errors (y/n)
Unit Tests Pass (y/n)
Documentation Included (y/n)

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Change Description

Adds a workflow to run integration tests on raspberrypi for https://github.com/fprime-community/fprime-workshop-led-blinker

Some notes:

• I didn't really find anything that was generic or complex enough to warrant abstracting things away in a reusable workflow/action. Although Run CI on UH Cubesat #2203 may reveal a need
• I'm opening this as a draft for now to wait on the above-mentioned issue and whether things need changing

[thomas-bc]

Integration tests currently fail because fprime-workshop-led-blinker:devel does not include the call to .startup() (and shutdown) even though it switched to using TcpServer. This wasn't caught because we're not running integration tests on this repo... which this PR will fix!
Although, it might be worth simply waiting for #2261 to be merged, which removes the need to explicitly call .startup() for TcpServer.

[LeStarch]

Merge it merge it!