test_install_and_strip intermittent failure

---- test_install::test_install_and_strip stdout ----
bin: "/home/runner/work/coreutils/coreutils/target/aarch64-unknown-linux-gnu/debug/coreutils"
write(default): /tmp/.tmpHq1mQ7/source
run: /home/runner/work/coreutils/coreutils/target/aarch64-unknown-linux-gnu/debug/coreutils install -s source helloworld_installed

thread 'test_install::test_install_and_strip' panicked at tests/by-util/test_install.rs:831:10:
Command was expected to succeed. code: 1
stdout = 
 stderr = install: strip program failed: Text file busy

stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/6b00bc3880198600130e1cf62b8f8a93494488cc/library/std/src/panicking.rs:697:5
   1: core::panicking::panic_fmt
             at /rustc/6b00bc3880198600130e1cf62b8f8a93494488cc/library/core/src/panicking.rs:75:14
   2: uutests::util::CmdResult::success
             at ./tests/uutests/src/lib/util.rs:499:9
   3: uutests::util::UCommand::succeeds
             at ./tests/uutests/src/lib/util.rs:2112:9
   4: tests::test_install::test_install_and_strip
             at ./tests/by-util/test_install.rs:825:5
   5: tests::test_install::test_install_and_strip::{{closure}}
             at ./tests/by-util/test_install.rs:804:28
   6: core::ops::function::FnOnce::call_once
             at /rustc/6b00bc3880198600130e1cf62b8f8a93494488cc/library/core/src/ops/function.rs:250:5
   7: core::ops::function::FnOnce::call_once
             at /rustc/6b00bc3880198600130e1cf62b8f8a93494488cc/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

https://github.com/uutils/coreutils/actions/runs/34702123153/job/103576171725?pr=14518

Start with tests/by-util/test_install.rs, especially test_install::test_install_and_strip around lines 804-831, and review the linked GitHub Actions run. Reproduce the intermittent install -s failure on the affected target and trace the Text file busy error from the test invocation. Done means the test no longer fails intermittently and still verifies successful installation and stripping.