Fix clippy complaints from Rust 1.89.0

Author: bobrik

foundations/src/telemetry/testing.rs

@@ -111,7 +111,7 @@ impl TestTelemetryContext {
 
     /// Returns all the log records produced in the test context.
     #[cfg(feature = "logging")]
-    pub fn log_records(&self) -> RwLockReadGuard<Vec<TestLogRecord>> {
+    pub fn log_records(&self) -> RwLockReadGuard<'_, Vec<TestLogRecord>> {
         self.log_records.read().unwrap()
     }
 

foundations/src/telemetry/tracing/testing.rs

@@ -63,7 +63,7 @@ impl TestTrace {
     /// ```
     ///
     /// [depth-first]: https://en.wikipedia.org/wiki/Depth-first_search
-    pub fn iter(&self) -> TestTraceIterator {
+    pub fn iter(&self) -> TestTraceIterator<'_> {
         TestTraceIterator {
             stack: vec![&self.0],
         }