lints to disable in tests

Description

In Arti have things like the following:

#[cfg(test)]
mod test {
    // @@ begin test lint list maintained by maint/add_warning @@
    #![allow(clippy::bool_assert_comparison)]
    #![allow(clippy::clone_on_copy)]
    #![allow(clippy::dbg_macro)]
    #![allow(clippy::mixed_attributes_style)]
    #![allow(clippy::print_stderr)]
    #![allow(clippy::print_stdout)]
    #![allow(clippy::single_char_pattern)]
    #![allow(clippy::unwrap_used)]
    #![allow(clippy::unchecked_duration_subtraction)]
    #![allow(clippy::useless_vec)]
    #![allow(clippy::needless_pass_by_value)]
    //! <!-- @@ end test lint list maintained by maint/add_warning @@ -->
    // TODO add this next lint to maint/add_warning, for all tests
    #![allow(clippy::iter_overeager_cloned)]

Our maint/add_warning is a Python script that keeps the (currently) 236 copies of this lint block in sync across our 61 crates.

It would be nice if there were a way to systematically and centrally disable these lints for all our tests. Probably, many of them should be disabled by default.

(@llogiq suggested I should file this ticket)

Version

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Additional Labels

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Start by reading the maint/add_warning Python script and examining the repeated test lint blocks across the 61 crates. Investigate whether Rust or Clippy configuration provides a central way to disable these lints for tests, and define done as removing the need to maintain the 236 copied blocks while preserving the intended lint behavior.