[Postponed] Rust: Add deny(unsafe_op_in_unsafe_fn) lint.

[Yury-Fridlyand]

Add #![deny(unsafe_op_in_unsafe_fn)] project-wide: https://doc.rust-lang.org/beta/nightly-rustc/rustc_lint/builtin/static.UNSAFE_OP_IN_UNSAFE_FN.html

I have to update license commment style to avoid

compilation errors

error: an inner attribute is not permitted following an outer doc comment
 --> src/lib.rs:5:1
  |
1 | / /**
2 | |  * Copyright GLIDE-for-Redis Project Contributors - SPDX Identifier: Apache-2.0
3 | |  */
  | |___- previous doc comment
4 |
5 |   #![deny(unsafe_op_in_unsafe_fn)]
  |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not permitted following an outer doc comment
6 |
7 |   use glide_core::start_socket_listener;
  |   -------------------------------------- the inner attribute doesn't annotate this `use` import
  |
  = note: inner attributes, like `#![no_std]`, annotate the item enclosing them, and are usually found at the beginning of source files
help: to annotate the `use` import, change the attribute from inner to outer style
  |
5 - #![deny(unsafe_op_in_unsafe_fn)]
5 + #[deny(unsafe_op_in_unsafe_fn)]
  |

error: could not compile `glide-rs` (lib) due to previous error

[Yury-Fridlyand]

As discussed with the team, wait for rust 2024 release (October 2024) and update to it. This lint will be built-in and mandatory.