rmeta file is not uplifted when -Zembed-metadata=no is used

### Problem This is required for the test infrastructure of rustc to work when building run_make_support with `-Zembed-metadata=no`. ### Steps 1. Build library with `-Zembed-metadata=no` 2. Observe only the rlib is uplifted and not the rmeta. ### Possible Solution(s) Uplift rmeta file. ### Notes _No response_ ### Version ```text cargo 1.98.0-beta.2 (864064524 2026-07-12) release: 1.98.0-beta.2 commit-hash: 864064524a7205e670579b6873d9b18897437eaf commit-date: 2026-07-12 host: x86_64-unknown-linux-gnu libgit2: 1.9.4 (sys:0.21.0 vendored) libcurl: 8.21.0-DEV (sys:0.4.90+curl-8.21.0 vendored ssl:OpenSSL/3.6.3) ssl: OpenSSL 3.6.3 9 Jun 2026 os: Arch Linux [64-bit] ```