Auto merge of #151836 - GuillaumeGomez:fix-gui-flakyness, r=<try>

Fix flakyness issue with `tests/rustdoc-gui/globals.goml` test


try-job: x86_64-gnu-tools

Author: bors

tests/rustdoc-gui/globals.goml

@@ -11,7 +11,7 @@ assert-window-property-false: {"searchIndex": null}
 // Form input
 go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
 call-function: ("perform-search", {"query": "Foo"})
-assert-window-property-false: {"searchIndex": null}
+wait-for-window-property-false: {"searchIndex": null}
 
 // source sidebar
 go-to: "file://" + |DOC_PATH| + "/src/test_docs/lib.rs.html"