Ignore buggy nonstandard_macro_braces clippy lint

Clippy bug: rust-lang/rust-clippy#7422

    error: use of irregular braces for `format_args!` macro
       --> test_suite/tests/test_gen.rs:528:25
        |
    528 |     #[derive(Serialize, Deserialize)]
        |                         ^^^^^^^^^^^
        |
        = note: `-D clippy::nonstandard-macro-braces` implied by `-D clippy::all`
    help: consider writing `Deserialize`
       --> test_suite/tests/test_gen.rs:528:25
        |
    528 |     #[derive(Serialize, Deserialize)]
        |                         ^^^^^^^^^^^
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonstandard_macro_braces
        = note: this error originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)

    error: use of irregular braces for `format_args!` macro
        --> test_suite/tests/test_annotations.rs:1791:43
         |
    1791 |     #[derive(Debug, PartialEq, Serialize, Deserialize)]
         |                                           ^^^^^^^^^^^
         |
         = note: `-D clippy::nonstandard-macro-braces` implied by `-D clippy::all`
    help: consider writing `Deserialize`
        --> test_suite/tests/test_annotations.rs:1791:43
         |
    1791 |     #[derive(Debug, PartialEq, Serialize, Deserialize)]
         |                                           ^^^^^^^^^^^
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonstandard_macro_braces
         = note: this error originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/test_annotations.rs

@@ -1,6 +1,8 @@
 #![allow(
     clippy::cast_lossless,
     clippy::from_over_into,
+    // Clippy bug: https://github.com/rust-lang/rust-clippy/issues/7422
+    clippy::nonstandard_macro_braces,
     clippy::trivially_copy_pass_by_ref
 )]
 

test_suite/tests/test_gen.rs

@@ -6,6 +6,8 @@
 #![allow(
     unknown_lints,
     mixed_script_confusables,
+    // Clippy bug: https://github.com/rust-lang/rust-clippy/issues/7422
+    clippy::nonstandard_macro_braces,
     clippy::ptr_arg,
     clippy::trivially_copy_pass_by_ref
 )]