Rollup merge of #130827 - fmease:library-mv-obj-save-dyn-compat, r=ib…

…raheemdev

Library: Rename "object safe" to "dyn compatible"

Completed T-lang FCP: rust-lang/lang-team#286 (comment).
Tracking issue: rust-lang/rust#130852

Regarding https://github.com/rust-lang/rust/labels/relnotes, I guess I will manually open a https://github.com/rust-lang/rust/labels/relnotes-tracking-issue since this change affects everything (compiler, library, tools, docs, books, everyday language).

r? ghost