rustc: 1.68.2 -> 1.69.0

[lblasc]

Description of changes

Pre-release draft, release will happen on 20.04.2023.

https://github.com/rust-lang/rust/blob/stable/RELEASES.md#version-1690-2023-04-20
https://blog.rust-lang.org/2023/04/20/Rust-1.69.0.html

Tested fd and vector on x86_64-linux both are building fine, looks like rust-lang/rust#107688
is included in this release.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[zowoq]

pkgs/development/compilers/rust/1_68.nix needs to be removed.

[lblasc]

thx @zowoq , pkgs/development/compilers/rust/1_68.nix is removed now.

[lblasc]

Built firefox, fd and vector on x86_64-linux.

[zowoq]

Built passthru.tests on x86_64-darwin.

[trofi]

Bisect claims 081c90f rustc: 1.68.2 -> 1.69.0 broke evcxr in staging:

$ nix build -f. evcxr -L
...
failures:

---- check_for_errors stdout ----
thread 'check_for_errors' panicked at 'assertion failed: `(left == right)`
  left: `[]`,
 right: `["warning 1:15-1:20"]`', evcxr/tests/integration_tests.rs:962:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    check_for_errors

test result: FAILED. 36 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 260.67s

error: test failed, to rerun pass `-p evcxr --test integration_tests`

[trofi]

Filed bug upstream as evcxr/evcxr#294