Remove requires_grad from regular TensorProxy and add specialized TensorProxy with requires_grad and is_leaf attributes #5665

Job	Run time
check-package / pkg-build (ubuntu-latest)	16s
check-schema / schema	13s
precommit-run / pre-commit	58s
check-package / merge-artifacts	9s
check-package / pkg-check (ubuntu-latest, 3.10)	2m 51s
check-package / pkg-check (ubuntu-latest, 3.11)	2m 26s
check-package / pkg-check (macOS-latest, 3.10)	1m 8s
check-package / pkg-check (macOS-latest, 3.11)	55s
check-package / pkg-check (windows-latest, 3.10)	2m 58s
check-package / pkg-check (windows-latest, 3.11)	3m 3s
check-package / pkg-guardian	1s
	14m 58s

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