add complete signal mcs code, but cannot fix bugs · rel4team/mi-dev-integral-rel4@acbde6e

ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636

unused import: `convert_to_option_mut_type_ref`

unused import: `notification_t`

unused import: `thread_state_func`

unused import: `sel4_common::structures_gen::seL4_Fault`

unused imports: `thread_control_caps_update_fault`, `thread_control_caps_update_ipc_buffer`, `thread_control_caps_update_space`

unused import: `OFFSET_TO_FREE_IDNEX`

unused imports: `convert_to_option_mut_type_ref`, `convert_to_option_type_ref`

unused import: `ThreadState`

function `OFFSET_TO_FREE_IDNEX` is never used

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