Draft: Reusing schema validators and serializers #5601

Job	Run time
build sdist	12s
build-wasm-emscripten	2m 58s
rust benchmarks	2m 55s
coverage	1m 51s
lint	56s
test-debug 3.13	48s
test MSRV	2m 15s
test-debug pypy3.10	1m 14s
test on ubuntu	1m 34s
test on macos	1m 45s
test on windows	4m 38s
test-pydantic-integration	1m 23s
test 3.9	1m 41s
test 3.10	1m 55s
build on ${{ matrix.os }} (${{ matrix.target }} - ${{ matrix.interpreter \|\| 'all' }}${{ (((matrix.os == 'linux') && format(' - {0}', (((matrix.manylinux == 'auto') && 'manylinux') \|\| matrix.manylinux))) \|\| '') }})	0s
build pgo-optimized on ${{ matrix.os }} / ${{ matrix.interpreter }}	0s
test 3.11	1m 45s
test 3.12	1m 47s
test 3.13	1m 42s
test pypy3.9	2m 8s
test pypy3.10	2m 10s
test build on ${{ matrix.os }}	0s
test build on ${{ matrix.target }}-${{ matrix.distro }}	0s
inspect-pypi-assets	0s
check	2s
release	0s
	35m 39s

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