Auto merge of #141869 - GuillaumeGomez:rollup-vicg807, r=GuillaumeGomez

Rollup of 9 pull requests

Successful merges:

 - rust-lang/rust#140370 (Improve diagnostics for usage of qualified paths within tuple struct exprs/pats)
 - rust-lang/rust#141224 (terminology: allocated object → allocation)
 - rust-lang/rust#141622 (implement `va_arg` for `powerpc`)
 - rust-lang/rust#141666 (source_span_for_markdown_range: fix utf8 violation)
 - rust-lang/rust#141789 (Exclude `CARGO_HOME` from `generate-copyright` in-tree determination)
 - rust-lang/rust#141823 (Drive-by refactor: use `OnceCell` for the reverse region SCC graph)
 - rust-lang/rust#141834 (Add unimplemented `current_dll_path()` for WASI)
 - rust-lang/rust#141846 (Fix TLS model on bootstrap for cygwin)
 - rust-lang/rust#141852 (resolve if-let-chain FIXME on bootstrap)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors