Rollup merge of #129957 - chenx97:lint-docs-linker-opt, r=albertlarsan68

forward linker option to lint-docs

This fixes an error found when building the doc for a cross-built toolchain.

```
warning: the code example in lint `unstable_syntax_pre_expansion` in /buildroots/chenx97/rustc-1.80.1-src/compiler/rustc_lint_defs/src/builtin.rs failed to generate the expected output: did not find lint `unstable_syntax_p
re_expansion` in output of example, got:

error: linking with `cc` failed: exit status: 1
...
```
Closes: #129956

Author: matthiaskrgr