Add methods to `Descriptor` + `DescriptorPublicKey` #1108

Job	Run time
Build and test macOS arm64 wheels (3.8)	5m 18s
Build and test Windows wheels (3.8)	5m 25s
Build and test macOS arm64 wheels (3.9)	6m 21s
Build and test macOS x86_64 wheels (3.8)	6m 10s
Build and test Windows wheels (3.9)	5m 49s
Build and test macOS arm64 wheels (3.10)	5m 7s
Build and test Manylinux 2.28 x86_64 wheels (cp38-cp38)	3m 39s
Build and test macOS x86_64 wheels (3.9)	8m 0s
Build and test Windows wheels (3.10)	5m 43s
Build and test Manylinux 2.28 x86_64 wheels (cp39-cp39)	3m 43s
Build and test macOS arm64 wheels (3.11)	4m 45s
Build and test Windows wheels (3.11)	6m 3s
Build and test macOS x86_64 wheels (3.10)	4m 34s
Build and test Manylinux 2.28 x86_64 wheels (cp310-cp310)	3m 38s
Build and test macOS arm64 wheels (3.12)	5m 26s
Build and test Windows wheels (3.12)	5m 28s
Build and test Manylinux 2.28 x86_64 wheels (cp311-cp311)	3m 45s
Build and test macOS x86_64 wheels (3.11)	5m 50s
Build and test macOS x86_64 wheels (3.12)	6m 58s
Build and test Manylinux 2.28 x86_64 wheels (cp312-cp312)	3m 49s
	1h 45m 31s

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