Auto merge of #138202 - jhpratt:rollup-kqrl5xn, r=jhpratt

Rollup of 12 pull requests

Successful merges:

 - #137337 (Add verbatim linker to AIXLinker)
 - #137363 (compiler: factor Windows x86-32 ABI impl into its own file)
 - #137537 (Prevent `rmake.rs` from using unstable features, and fix 3 run-make tests that currently do)
 - #137606 (add a "future" edition)
 - #137957 (Remove i586-pc-windows-msvc)
 - #138000 (atomic: clarify that failing conditional RMW operations are not 'writes')
 - #138013 (Add post-merge analysis CI workflow)
 - #138033 (rustdoc: Add attribute-related tests for rustdoc JSON.)
 - #138137 (setTargetTriple now accepts Triple rather than string)
 - #138173 (Delay bug for negative auto trait rather than ICEing)
 - #138184 (Allow anyone to relabel `CI-spurious-*`)
 - #138187 (remove clones)

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

Author: bors

src/tests/compiletest.md

@@ -415,6 +415,10 @@ Compiletest directives like `//@ only-<target>` or `//@ ignore-<target>` are
 supported in `rmake.rs`, like in UI tests. However, revisions or building
 auxiliary via directives are not currently supported.
 
+`rmake.rs` and `run-make-support` may *not* use any nightly/unstable features,
+as they must be compilable by a stage 0 rustc that may be a beta or even stable
+rustc.
+
 #### Quickly check if `rmake.rs` tests can be compiled
 
 You can quickly check if `rmake.rs` tests can be compiled without having to