Upgrade Rust to version 1.76 #5443

Job	Run time
formatting-dprint	14s
generate-ffi	2m 55s
lint-commits	12s
ln-dlc-node-tests	6m 41s
Format and lint Flutter code	55s
e2e_tests_prepare	9m 59s
payout-curve	3m 28s
clippy	3m 49s
unit-tests	9m 13s
e2e-tests (./target/debug/deps/e2e_basic-32ae9b8846847b87)	1m 36s
e2e-tests (./target/debug/deps/e2e_close_position-9a24419b82daef67)	3m 0s
e2e-tests (./target/debug/deps/e2e_collaborative_close_channel-45247dc794f29cf5)	3m 36s
e2e-tests (./target/debug/deps/e2e_collaborative_revert-0c4bba3e30b05666)	2m 27s
e2e-tests (./target/debug/deps/e2e_force_close_position-289408620cf52376)	2m 27s
e2e-tests (./target/debug/deps/e2e_open_position-e60f0ec0f0bd44ca)	1m 57s
e2e-tests (./target/debug/deps/e2e_open_position_small_utxos-ba89a468e7190e37)	2m 27s
e2e-tests (./target/debug/deps/e2e_reject_offer-338c95a574b4b801)	1m 53s
e2e-tests (./target/debug/deps/e2e_restore_from_backup-ee4bc4aeee8f1683)	2m 20s
e2e-tests (./target/debug/deps/e2e_rollover_position-5e818e1d8e0eeca9)	3m 16s
e2e_tests_check	1s
	1h 2m 26s

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