[ci] Update rust in ci image (1.75 and 2024-01-22) (#3016)

cc https://github.com/paritytech/ci_cd/issues/926

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: command-bot <>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: Dónal Murray <donal.murray@parity.io>
Co-authored-by: Vladimir Istyufeev <vladimir@parity.io>

polkadot/node/subsystem-bench/src/availability/mod.rs

@@ -161,7 +161,7 @@ fn prepare_test_inner(
 			candidate_hashes
 				.get(&Hash::repeat_byte(block_num as u8))
 				.expect("just inserted above")
-				.get(0)
+				.first()
 				.expect("just inserted above")
 				.clone(),
 		);

polkadot/node/subsystem-bench/src/core/keyring.rs

@@ -17,7 +17,6 @@
 use polkadot_primitives::ValidatorId;
 use sc_keystore::LocalKeystore;
 use sp_application_crypto::AppCrypto;
-pub use sp_core::sr25519;
 use sp_core::sr25519::Public;
 use sp_keystore::Keystore;
 use std::sync::Arc;

polkadot/node/subsystem-bench/src/core/mock/mod.rs

@@ -25,7 +25,6 @@ pub mod runtime_api;
 
 pub use av_store::*;
 pub use chain_api::*;
-pub use network_bridge::*;
 pub use runtime_api::*;
 
 pub struct AlwaysSupportsParachains {}