Simplify setup

Author: utpilla

opentelemetry/benches/metrics.rs

@@ -67,10 +67,10 @@ fn counter_add(c: &mut Criterion) {
     c.bench_function("AddWithDynamicAttributes", |b| {
         b.iter_batched(
             || {
-                let value1 = "a".repeat(6); // Repeat character six times to match the length of value strings used in other benchmarks
-                let value2 = "b".repeat(6);
-                let value3 = "c".repeat(6);
-                let value4 = "d".repeat(6);
+                let value1 = "value1".to_string(); // Repeat character six times to match the length of value strings used in other benchmarks
+                let value2 = "value2".to_string();
+                let value3 = "value3".to_string();
+                let value4 = "value4".to_string();
 
                 (value1, value2, value3, value4)
             },