Auto merge of #8905 - c410-f3r:arith, r=llogiq

Auto merge of #8905 - c410-f3r:arith, r=llogiq

[1/N] Implement Arithmetic lint

Assuming that https://github.com/rust-lang/rust-clippy/issues/8903 is OK, this PR starts the creation of the `Arithmetic` lint with configurable types.

My current struggle to get a rustc review inspired me to create smaller PRs in order to easy review and make merges as fast as possible. So the first step here only moves the `arithmetic.rs` file to `numeric_arithmetic.rs` to make room for the new lint.

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changelog: none