rust: re-enable the unit tests that are ignored

Some unit tests were previously marked as ignored due to failures in earlier
versions of Rust. With the upgrade to Rust 1.85.1, these tests are now passing
consistently. They've been re-enabled and verified to run successfully on the
latest version.

(From OE-Core rev: 65c207fb034848f9ef0de8cf8725c5eded363aca)

Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/rust/files/rust-oe-selftest.patch

@@ -43,86 +43,6 @@ diff --git a/compiler/rustc_interface/src/tests.rs b/compiler/rustc_interface/sr
  fn test_can_print_warnings() {
      sess_and_cfg(&["-Awarnings"], |sess, _cfg| {
          assert!(!sess.dcx().can_emit_warnings());
-diff --git a/library/std/src/sync/mpsc/tests.rs b/library/std/src/sync/mpsc/tests.rs
-index ac1a804cf9c..7c687982324 100644
---- a/library/std/src/sync/mpsc/tests.rs
-+++ b/library/std/src/sync/mpsc/tests.rs
-@@ -233,6 +233,7 @@ fn oneshot_single_thread_send_port_close() {
- }
-
- #[test]
-+#[ignore]
- fn oneshot_single_thread_recv_chan_close() {
-     // Receiving on a closed chan will panic
-     let res = thread::spawn(move || {
-@@ -313,6 +314,7 @@ fn oneshot_multi_task_recv_then_send() {
- }
-
- #[test]
-+#[ignore]
- fn oneshot_multi_task_recv_then_close() {
-     let (tx, rx) = channel::<Box<i32>>();
-     let _t = thread::spawn(move || {
-@@ -337,6 +339,7 @@ fn oneshot_multi_thread_close_stress() {
- }
-
- #[test]
-+#[ignore]
- fn oneshot_multi_thread_send_close_stress() {
-     for _ in 0..stress_factor() {
-         let (tx, rx) = channel::<i32>();
-@@ -351,6 +354,7 @@ fn oneshot_multi_thread_send_close_stress() {
- }
-
- #[test]
-+#[ignore]
- fn oneshot_multi_thread_recv_close_stress() {
-     for _ in 0..stress_factor() {
-         let (tx, rx) = channel::<i32>();
-diff --git a/library/std/src/sync/poison/mutex/tests.rs b/library/std/src/sync/poison/mutex/tests.rs
-index 1786a3c09ff..9dcead7092b 100644
---- a/library/std/src/sync/poison/mutex/tests.rs
-+++ b/library/std/src/sync/poison/mutex/tests.rs
-@@ -82,6 +82,7 @@ fn drop(&mut self) {
- }
-
- #[test]
-+#[ignore]
- fn test_into_inner_poison() {
-     let m = new_poisoned_mutex(NonCopy(10));
-
-@@ -106,6 +107,7 @@ fn test_get_mut() {
- }
-
- #[test]
-+#[ignore]
- fn test_get_mut_poison() {
-     let mut m = new_poisoned_mutex(NonCopy(10));
-
-@@ -146,6 +148,7 @@ fn test_mutex_arc_condvar() {
- }
-
- #[test]
-+#[ignore]
- fn test_arc_condvar_poison() {
-     let packet = Packet(Arc::new((Mutex::new(1), Condvar::new())));
-     let packet2 = Packet(packet.0.clone());
-@@ -175,6 +178,7 @@ fn test_arc_condvar_poison() {
- }
-
- #[test]
-+#[ignore]
- fn test_mutex_arc_poison() {
-     let arc = Arc::new(Mutex::new(1));
-     assert!(!arc.is_poisoned());
-@@ -220,6 +220,7 @@ fn test_mutex_arc_nested() {
- }
-
- #[test]
-+#[ignore]
- fn test_mutex_arc_access_in_unwind() {
-     let arc = Arc::new(Mutex::new(1));
-     let arc2 = arc.clone();
 diff --git a/library/std/src/sync/poison/rwlock/tests.rs b/library/std/src/sync/poison/rwlock/tests.rs
 index 1a9d3d3f12f..0a9cfc48806 100644
 --- a/library/std/src/sync/poison/rwlock/tests.rs
@@ -183,26 +103,6 @@ index 1a9d3d3f12f..0a9cfc48806 100644
  fn test_get_mut_poison() {
      let mut m = new_poisoned_rwlock(NonCopy(10));
 
-diff --git a/library/std/src/sys/pal/unix/process/process_unix/tests.rs b/library/std/src/sys/pal/unix/process/process_unix/tests.rs
-index 0a6c6ec19fc..bec257bc630 100644
---- a/library/std/src/sys/pal/unix/process/process_unix/tests.rs
-+++ b/library/std/src/sys/pal/unix/process/process_unix/tests.rs
-@@ -6,6 +6,7 @@
- // safety etc., are tested in tests/ui/process/process-panic-after-fork.rs
-
- #[test]
-+#[ignore]
- fn exitstatus_display_tests() {
-     // In practice this is the same on every Unix.
-     // If some weird platform turns out to be different, and this test fails, use #[cfg].
-@@ -37,6 +38,7 @@
- }
-
- #[test]
-+#[ignore]
- #[cfg_attr(target_os = "emscripten", ignore)]
- fn test_command_fork_no_unwind() {
-     let got = catch_unwind(|| {
 diff --git a/library/std/src/thread/tests.rs b/library/std/src/thread/tests.rs
 index 5d6b9e94ee9..a5aacb2eb87 100644
 --- a/library/std/src/thread/tests.rs