Upgrade Rust to 1.52.0 (#17096)

* Upgrade Rust to 1.52.0
update nightly_version to newly pushed docker image
fix clippy lint errors
1.52 comes with grcov 0.8.0, include this version to script

* upgrade to Rust 1.52.1

* disabling Serum from downstream projects until it is upgraded to Rust 1.52.1

perf/src/cuda_runtime.rs

@@ -315,7 +315,7 @@ mod tests {
         assert_eq!(mem[0], 50);
         assert_eq!(mem[1], 10);
         assert_eq!(mem.len(), 2);
-        assert_eq!(mem.is_empty(), false);
+        assert!(!mem.is_empty());
         let mut iter = mem.iter();
         assert_eq!(*iter.next().unwrap(), 50);
         assert_eq!(*iter.next().unwrap(), 10);

perf/src/recycler.rs

@@ -71,6 +71,7 @@ fn warm_recyclers() -> bool {
 }
 
 impl<T: Default + Reset + Sized> Recycler<T> {
+    #[allow(clippy::needless_collect)]
     pub fn warmed(num: usize, size_hint: usize) -> Self {
         let new = Self::default();
         if warm_recyclers() {

perf/src/sigverify.rs

@@ -495,9 +495,9 @@ mod tests {
         batch.packets.push(Packet::default());
         let mut batches: Vec<Packets> = vec![batch];
         mark_disabled(&mut batches, &[vec![0]]);
-        assert_eq!(batches[0].packets[0].meta.discard, true);
+        assert!(batches[0].packets[0].meta.discard);
         mark_disabled(&mut batches, &[vec![1]]);
-        assert_eq!(batches[0].packets[0].meta.discard, false);
+        assert!(!batches[0].packets[0].meta.discard);
     }
 
     #[test]