chore: make config.txt optional at startup #28555

Job	Run time
Code / Compiles	2m 8s
Spotless / Check	2m 5s
Dependency (Module Info) / Check	1m 44s
HAPI Tests (Misc) / Standard	32m 30s
HAPI Tests (Node Death Reconnect) / Standard	6m 54s
HAPI Tests (Restart) / Standard	10m 5s
HAPI Tests (Crypto) / Standard	20m 53s
HAPI Tests (Smart Contract) / Standard	41m 36s
HAPI Tests (Time Consuming) / Standard	25m 34s
HAPI Tests (Token) / Standard	14m 1s
JRS Panel / Platform SDK	20m 21s
Docker Determinism / Generate Baseline	5m 27s
Gradle Determinism / Generate Baseline	2m 22s
Hedera Node JRS Panel / Abbrev Update Test	41m 11s
Snyk Scan / Standard	3m 31s
Unit Tests / Standard	7m 34s
Gradle Determinism / Verify Artifacts (ubuntu-22.04)	9m 11s
Gradle Determinism / Verify Artifacts (ubuntu-20.04)	9m 21s
Gradle Determinism / Verify Artifacts (windows-2022)	12m 50s
Gradle Determinism / Verify Artifacts (windows-2019)	13m 10s
Gradle Determinism / Verify Artifacts (network-node-linux-medium)	5m 52s
Gradle Determinism / Verify Artifacts (network-node-linux-large)	5m 11s
Docker Determinism / Verify Artifacts (network-node-linux-medium)	3m 15s
Docker Determinism / Verify Artifacts (network-node-linux-large)	3m 12s
	4h 59m 58s

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