Auto merge of #142358 - matthiaskrgr:rollup-fxe6m7k, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang/rust#141967 (Configure bootstrap backport nominations through triagebot)
 - rust-lang/rust#142042 (Make E0621 missing lifetime suggestion verbose)
 - rust-lang/rust#142272 (tests: Change ABIs in tests to more future-resilient ones)
 - rust-lang/rust#142282 (Only run `citool` tests on the `auto` branch)
 - rust-lang/rust#142297 (Implement `//@ needs-target-std` compiletest directive)
 - rust-lang/rust#142298 (Make loongarch-none target maintainers more easily pingable)
 - rust-lang/rust#142306 (Dont unwrap and re-wrap typing envs)
 - rust-lang/rust#142324 (Remove unneeded `FunctionCx` from some codegen methods)
 - rust-lang/rust#142328 (feat: Add `bit_width` for unsigned integer types)

Failed merges:

 - rust-lang/rust#141639 (Expose discriminant values in stable_mir)

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

Author: bors

src/tests/directives.md

@@ -202,6 +202,7 @@ settings:
   `//@ needs-crate-type: cdylib, proc-macro` will cause the test to be ignored
   on `wasm32-unknown-unknown` target because the target does not support the
   `proc-macro` crate type.
+- `needs-target-std` — ignores if target platform does not have std support.
 
 The following directives will check LLVM support: