Refactor DiscoveryServerParticipant #1200

Job	Run time
reusable_tests / asan	10m 54s
reusable_tests / flaky	10m 2s
reusable_tests / coverage	11m 36s
reusable_tests / clang	4m 45s
reusable_tests / python-linter	11s
reusable_tests / tsan	11m 11s
reusable_tests / ubuntu-multiplatform-tests (Release, ubuntu-22.04)	10m 18s
reusable_tests / uncrustify	33s
reusable_tests / ubuntu-multiplatform-tests (Release, ubuntu-24.04)	11m 50s
reusable_tests / ubuntu-multiplatform-tests (Debug, ubuntu-22.04)	9m 43s
reusable_tests / windows-multiplatform-tests (Release, windows-2019)	20m 58s
reusable_tests / ubuntu-multiplatform-tests (Debug, ubuntu-24.04)	10m 45s
reusable_tests / windows-multiplatform-tests (Release, windows-2022)	17m 33s
reusable_tests / windows-multiplatform-tests (Debug, windows-2019)	15m 22s
reusable_tests / windows-multiplatform-tests (Debug, windows-2022)	19m 10s
	2h 44m 51s

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