Automatic toolchain upgrade to nightly-2023-08-20

[github-actions]

Update Rust toolchain from nightly-2023-08-19 to nightly-2023-08-20 without any other source changes.
This is an automatically generated pull request. If any of the CI checks fail, manual intervention is required. In such a case, review the changes at https://github.com/rust-lang/rust from rust-lang/rust@d06ca0f up to rust-lang/rust@6ef7d16. The log for this commit range is:
rust-lang/rust@6ef7d16be0 Auto merge of #114979 - weihanglo:update-cargo, r=weihanglo
rust-lang/rust@3e50a641da Auto merge of #114980 - matthiaskrgr:rollup-3y7651q, r=matthiaskrgr
rust-lang/rust@07ff87bf73 Update cargo
rust-lang/rust@8e0a8cdecb Rollup merge of #114977 - kpreid:modulo, r=thomcc
rust-lang/rust@d8bde4878a Rollup merge of #114972 - nbdd0121:const_check, r=compiler-errors
rust-lang/rust@8d52b4d2f3 Rollup merge of #114971 - kpreid:trig, r=joshtriplett
rust-lang/rust@2b13128be8 Rollup merge of #114958 - ferrocene:optimization-remarks-dir-pgo, r=lqd
rust-lang/rust@0e609c4610 Rollup merge of #114953 - WaffleLapkin:waffle-back-to-rotation-hehehee, r=WaffleLapkin
rust-lang/rust@2c21635382 Add modulo and mod as doc aliases for rem_euclid.
rust-lang/rust@26fe88fedb Add a test to check that inline const is in required_consts
rust-lang/rust@c353dbd57f Add doc aliases for trigonometry and other f32,f64 methods.
rust-lang/rust@fb148f682e ignore-cross-compile on optimization-remarks-dir-pgo test
rust-lang/rust@54bd826d56 Add waffle back to review rotation

[adpaco-aws]

Looks like there are regressions on the usual suspects?

[zhassan-aws]

Yeah. I think we should run those locally and check the numbers, because they can just be noise.

[celinval]

Blocking this PR in favor of #2711.