Add staking and unstaking extrinsics #1111

Job	Run time
find-tests	4s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_incentive.py)	11m 43s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_subtensor_...	9m 13s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_liquid_alp...	8m 54s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_root_set_w...	10m 37s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_metagraph.py)	7m 48s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_neuron_cer...	11m 57s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_transfer.py)	8m 27s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_commit_wei...	10m 26s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_axon.py)	8m 8s
run (nightly-2024-03-05, x86_64-unknown-linux-gnu, ubuntu-latest, tests/e2e_tests/test_dendrite.py)	9m 52s
	1h 37m 9s

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