Rollup of 7 pull requests

[GuillaumeGomez]

Successful merges:

• gpu offload host code generation #142097 (gpu offload host code generation)
• Miri: non-deterministic floating point operations in foreign_items #143906 (Miri: non-deterministic floating point operations in foreign_items)
• tests: Skip supported-crate-types test on musl hosts #144144 (tests: Skip supported-crate-types test on musl hosts)
• opt-dist: change build_dir field to be an actual build dir #144159 (opt-dist: change build_dir field to be an actual build dir)
• Debug impls for DropElaborators #144162 (Debug impls for DropElaborators)
• Add non-regression test for #144168 #144189 (Add non-regression test for zerocopy-0.8.25 no longer builds on nightly #144168)
• Don't consider unstable fields always-inhabited #144216 (Don't consider unstable fields always-inhabited)

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