Auto merge of #54939 - pnkfelix:issue-54478-dont-prefer-dynamic-in-doc-tests, r=<try>

[WIP] rustdoc: don't prefer dynamic linking in doc tests

This is an attempt to address the regression in #54478

This may be a case where the cure is worse than the disease, at least in the short term...

cc @alexcrichton

Author: bors

src/librustdoc/test.rs

@@ -220,7 +220,6 @@ fn run_test(test: &str, cratename: &str, filename: &FileName, line: usize,
         output_types: outputs,
         externs,
         cg: config::CodegenOptions {
-            prefer_dynamic: true,
             linker,
             ..cg
         },