fix: allow to overwrite flutter version #5754

Job	Run time
generate-ffi	5m 6s
ln-dlc-node-tests	6m 41s
lint-commits	9s
formatting-dprint	18s
e2e_tests_prepare	9m 11s
Format and lint Flutter code	3m 58s
payout-curve	2m 26s
clippy	4m 2s
unit-tests	10m 44s
e2e-tests (./target/debug/deps/e2e_basic-2f8733ed81168df1)	3m 39s
e2e-tests (./target/debug/deps/e2e_close_position-9f49ab4c30c4e089)	4m 50s
e2e-tests (./target/debug/deps/e2e_collaborative_close_channel-819e8698a73a9f78)	4m 31s
e2e-tests (./target/debug/deps/e2e_collaborative_revert-f870d09de797af70)	4m 34s
e2e-tests (./target/debug/deps/e2e_force_close_position-f4d4c144c76b6cda)	4m 29s
e2e-tests (./target/debug/deps/e2e_force_close_settled_channel-0d9731abf944de7c)	5m 6s
e2e-tests (./target/debug/deps/e2e_open_position-da489da8da9ea40b)	3m 55s
e2e-tests (./target/debug/deps/e2e_open_position_small_utxos-6b53a644c5231a96)	5m 22s
e2e-tests (./target/debug/deps/e2e_reject_offer-853c527e0fd77a0e)	4m 0s
e2e-tests (./target/debug/deps/e2e_restore_from_backup-832d9a1b2bc45669)	4m 34s
e2e-tests (./target/debug/deps/e2e_rollover_position-a3d41b0ab2152729)	4m 34s
e2e_tests_check	1s
	1h 32m 10s

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