chore: Remove TestProtocol #186

Job	Run time
Build and publish artifacts and plugins locally	2m 40s
Basic checks	51s
Check service docker image contents	41s
Run sbt test	4m 22s
Run annotation processor tests	1m 53s
Maven samples (shopping-cart-quickstart, true)	1m 3s
Maven samples (choreography-saga-quickstart, true)	56s
Maven samples (doc-snippets, false)	43s
Maven samples (view-store, true)	1m 11s
Maven samples (spring-dependency-injection, true)	46s
Maven samples (event-sourced-customer-registry, true)	51s
Maven samples (event-sourced-counter-brokers, docker compose up -d, true)	1m 29s
Maven samples (event-sourced-customer-registry-subscriber, true, ./start-upstream.sh)	1m 5s
Maven samples (key-value-counter, true)	43s
Maven samples (key-value-shopping-cart, true)	46s
Maven samples (key-value-customer-registry, true)	54s
Maven samples (tracing, false)	28s
Maven samples (reliable-timers, true)	46s
Maven samples (transfer-workflow, true)	44s
Maven samples (transfer-workflow-compensation, true)	51s
	23m 43s

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