Make `RecoveryId` an enum #1452

Job	Run time
Format - nightly toolchain	14s
Prepare	3s
Test - stable toolchain (minimal)	3m 19s
Test - stable toolchain (recent)	3m 18s
Test 32-bit version	26s
Test - 1.63.0 toolchain (minimal)	5m 55s
Test - 1.63.0 toolchain (recent)	5m 50s
WASM - stable toolchain	1m 45s
Docs - stable toolchain (recent)	14s
Lint - nightly toolchain (recent)	23s
Docs - nightly toolchain (recent)	25s
Bench - nightly toolchain (recent)	22s
ASAN - nightly toolchain (recent)	1m 27s
Test - nightly toolchain (minimal)	2m 33s
Test - nightly toolchain (recent)	2m 26s
no-std - nightly toolchain (recent)	58s
	29m 38s

Provide feedback