Merge rust-bitcoin/rust-bitcoin#4565: Remove all `p2p` dependency fro… #9

Job	Run time
Cross test - stable toolchain	1m 38s
Docs - stable toolchain (recent)	1m 23s
Test 32-bit version	51s
Prepare	3s
Test - MSRV toolchain (recent)	26m 46s
Test - stable toolchain (recent)	15m 47s
Test - stable toolchain (minimal)	15m 38s
Test - MSRV toolchain (minimal)	26m 41s
Kani codegen - stable toolchain	1m 7s
WASM - stable toolchain	1m 41s
Lint - nightly toolchain (recent)	1m 15s
Docs - nightly toolchain (recent)	1m 15s
Test - nightly toolchain (recent)	13m 23s
Test - nightly toolchain (minimal)	12m 56s
Bench - nightly toolchain (recent)	2m 14s
ASAN - nightly toolchain (recent)	39s
Embedded - nightly toolchain	2m 10s
	2h 5m 27s

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