refactor(chain): Replace canonical_ancestors with canonical_spends #278

Job	Run time
prepare	4s
Rust fmt	18s
Check no_std	41s
Build & Test (1.88.0, true, --all-features)	3m 41s
Check WASM	1m 15s
Build & Test (1.88.0, true, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	1m 55s
Build & Test (1.63.0, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	7m 44s
Build & Test Examples (example_esplora)	1m 1s
Build & Test Examples (example_cli)	32s
Rust clippy	1m 20s
Build & Test Examples (example_bitcoind_rpc_polling)	43s
Build & Test (1.75.0, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	2m 3s
Build & Test (1.63.0, --all-features)	9m 2s
Build & Test (1.75.0, --all-features)	4m 1s
Build & Test Examples (example_electrum)	54s
	35m 14s

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