Auto merge of #154255 - JonathanBrouwer:rollup-kVSo6wy, r=JonathanBrouwer

Rollup of 21 pull requests

Successful merges:

 - rust-lang/rust#152543 (privacy: Fix type privacy holes in RPITITs)
 - rust-lang/rust#153107 (Optimize BTreeMap::append() using CursorMut)
 - rust-lang/rust#153312 (Packages as namespaces part 1)
 - rust-lang/rust#153534 (Remove a flaky `got_timeout` assert from two channel tests)
 - rust-lang/rust#153718 (Fix environ on FreeBSD with cdylib targets that use -Wl,--no-undefined .)
 - rust-lang/rust#153857 (Rename `target.abi` to `target.cfg_abi` and enum-ify llvm_abiname)
 - rust-lang/rust#153880 (Lifted intersperse and intersperse_with Fused transformation and updated documentation + tests)
 - rust-lang/rust#153931 (remove usages of to-be-deprecated numeric constants)
 - rust-lang/rust#150630 (Unknown -> Unsupported compression algorithm)
 - rust-lang/rust#153491 (Move `freeze_*` methods to `OpenOptionsExt2`)
 - rust-lang/rust#153582 (Simplify find_attr! for HirId usage)
 - rust-lang/rust#153623 (std: move `sys::pal::os` to `sys::paths`)
 - rust-lang/rust#153647 (docs(fs): Clarify That File::lock Coordinates Across Processes)
 - rust-lang/rust#153936 (Skip stack_start_aligned for immediate-abort)
 - rust-lang/rust#154011 (implement `BinaryHeap::as_mut_slice`)
 - rust-lang/rust#154167 (ui/lto: move and rename two tests from issues/)
 - rust-lang/rust#154174 (allow `incomplete_features` in most UI tests)
 - rust-lang/rust#154175 (Add new alias for Guillaume Gomez email address)
 - rust-lang/rust#154182 (diagnostics: avoid ICE for undeclared generic parameter in impl)
 - rust-lang/rust#154188 (Update the tracking issue for #[diagnostic::on_move])
 - rust-lang/rust#154201 (Use enums to clarify `DepNodeColorMap` color marking )