chore: don't establish connections in non-relay bootstrap nodes #4978

Job	Run time
changes	6s
Lint	9s
build-ubuntu-latest	19m 19s
test-ubuntu-latest	15m 58s
test-macos-13	16m 49s
build-macos-13	13m 51s
build-docker-image / docker-build-ubuntu-latest	4m 36s
js-waku-node-optional / node	1m 43s
js-waku-node / node	21m 39s
	1h 34m 10s

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