Rollup of 9 pull requests
Successful merges:
- rust-lang/rust#147938 (Add const cloning of slices and tests)
- rust-lang/rust#149718 (Add freeze file times on Windows)
- rust-lang/rust#150438 (Remove mentions of debootstrap and chroots from the m68k-unknown-none-elf platform support doc)
- rust-lang/rust#150790 (feat: invisible character help string)
- rust-lang/rust#150906 (Simplify `#[eii]` macro using methods on ecx)
- rust-lang/rust#150938 (Port `#[collapse_debuginfo]` to the new attribute parsing system)
- rust-lang/rust#150953 (std: sys: fs: uefi: Implement copy)
- rust-lang/rust#150964 (Completely list all unparsed attributes)
- rust-lang/rust#150975 (ui: add test for normalizing const projections with assoc const equality)
Failed merges:
- rust-lang/rust#150972 (Rename EII attributes slightly (being consistent in naming things foreign items, not extern items))
r? @ghost
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