Rollup merge of #91319 - fee1-dead:rustdoc-ice-fix, r=jyn514

Change output path to {{build-base}} for rustdoc scrape_examples ui test

See #90611 (comment)

r? `@jyn514`

cc `@petrochenkov`

src/test/rustdoc-ui/scrape-examples-ice.rs

@@ -1,4 +1,4 @@
-// compile-flags: -Z unstable-options --scrape-examples-output-path t.calls --scrape-examples-target-crate foobar
+// compile-flags: -Z unstable-options --scrape-examples-output-path {{build-base}}/t.calls --scrape-examples-target-crate foobar
 // check-pass
 #![no_std]
 use core as _;