Use selection for blob certificates #236

Job	Run time
Check (libp2p)	2m 59s
Rust lints (libp2p)	3m 3s
Check (waku)	6m 14s
Rust lints (waku)	5m 6s
Test Suite (libp2p, ubuntu-latest)	9m 6s
Test Suite (libp2p, windows-latest)	21m 27s
Test Suite (libp2p, macos-latest)	14m 29s
Test Suite (waku, ubuntu-latest)	10m 43s
Test Suite (waku, windows-latest)	22m 3s
Test Suite (waku, macos-latest)	17m 5s
	1h 52m 15s

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