test(chain): `batch_insert_relevant` inserts conflicting tx #285

Job	Run time
Build & Test Examples (example_cli)	43s
Build and test (stable, true, --no-default-features --features miniscript/no-std)	2m 16s
Check no_std	36s
Build & Test Examples (example_bitcoind_rpc_polling)	31s
Build and test (stable, true, --all-features)	3m 55s
Build & Test Examples (example_electrum)	47s
Build and test (1.63.0, --no-default-features --features miniscript/no-std)	3m 37s
Check WASM	1m 10s
Build & Test Examples (example_esplora)	55s
Rust fmt	5s
Build and test (1.63.0, --all-features)	5m 27s
Build & Test Examples (example_wallet_electrum)	1m 4s
prepare	5s
Build & Test Examples (example_wallet_esplora_async)	53s
Build & Test Examples (example_wallet_esplora_blocking)	58s
Build & Test Examples (example_wallet_rpc)	39s
clippy_check	49s
	24m 30s

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