Fix clippy warnings

(cherry picked from commit 0589df7)

Upd:
- Added more clippy fixes for the fork-specific code.

src/context.rs

@@ -660,7 +660,7 @@ impl Context {
         let deserialized: Value = rmp_serde::from_slice(&serialized)?;
         Ok(Context {
             session: self.session.clone(),
-            page_size: self.page_size.clone(),
+            page_size: self.page_size,
             statements: self.statements.clone(),
             stats: TryLock::new(SessionStats::default()),
             retry_number: self.retry_number,
@@ -707,6 +707,7 @@ impl Context {
     }
 
     /// Creates a preset for uneven row distribution among partitions
+    #[allow(clippy::comparison_chain)]
     pub async fn init_partition_row_distribution_preset(
         &mut self,
         preset_name: &str,

src/stats.rs

@@ -727,15 +727,12 @@ mod test {
     fn random_vector(seed: usize, len: usize, mean: f64, std_dev: f64) -> Vec<f32> {
         let mut rng = StdRng::seed_from_u64(seed as u64);
         let distrib = Normal::new(mean, std_dev).unwrap();
-        (0..len)
-            .into_iter()
-            .map(|_| distrib.sample(&mut rng) as f32)
-            .collect()
+        (0..len).map(|_| distrib.sample(&mut rng) as f32).collect()
     }
 
     /// Introduces a strong dependency between the observations,
     /// making it an AR(1) process
-    fn make_autocorrelated(v: &mut Vec<f32>) {
+    fn make_autocorrelated(v: &mut [f32]) {
         for i in 1..v.len() {
             v[i] = 0.01 * v[i] + 0.99 * v[i - 1];
         }