Auto merge of #48144 - kennytm:reduce-musl-test-size, r=Mark-Simulacrum

Compiletest: delete the compiled program once its test is done.

Reduces CI disk usage which prevents #48118 from succeeding.

src/tools/compiletest/src/runtest.rs

@@ -1343,7 +1343,7 @@ impl<'test> TestCx<'test> {
  fn exec_compiled_test(&self) -> ProcRes {
  let env = &self.props.exec_env;
 
- match &*self.config.target {
+ let proc_res = match &*self.config.target {
  // This is pretty similar to below, we're transforming:
  //
  // program arg1 arg2
@@ -1398,7 +1398,15 @@ impl<'test> TestCx<'test> {
  None,
  )
  }
+ };
+
+ if proc_res.status.success() {
+ // delete the executable after running it to save space.
+ // it is ok if the deletion failed.
+ let _ = fs::remove_file(self.make_exe_name());
  }
+
+ proc_res
  }
 
  /// For each `aux-build: foo/bar` annotation, we check to find the