Auto merge of #72672 - seritools:remote-test-windows, r=Mark-Simulacrum

Make remote-test-client and remote-test-server compatible with windows

`compiletest` and `remote-test-client`:

The command line for `remote-test-client` was changed slightly to allow cross-platform compatible paths. The old way of supplying the support libs was by joining their paths with the executable path
with `:`. This caused Windows-style paths to be split after the directory letter. Now, the number of support libs is provided as a parameter as well, and the support lib paths are split off from the regular args in the client.

`remote-test-server`:

- Marked Unix-only parts as such and implemented Windows alternatives
- On Windows `LD_LIBRARY_PATH` doesn't exist. Libraries are loaded from `PATH` though, so that's the way around it.
- Tiny cleanup: `Command::args`/`envs` instead of manually looping over them
- The temp path for Windows has to be set via environment variable, since there isn't a global temp directory that would work on every machine (as a static string)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index 9f305ea4729..a99e39ed354 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1769,7 +1769,7 @@ impl Step for Crate {
         } else if builder.remote_tested(target) {
             cargo.env(
                 format!("CARGO_TARGET_{}_RUNNER", envify(&target)),
-                format!("{} run", builder.tool_exe(Tool::RemoteTestClient).display()),
+                format!("{} run 0", builder.tool_exe(Tool::RemoteTestClient).display()),
             );
         }