Add trailing newlines to shared code (Azure#36250)

Without newlines, shared files may break linting rules in the autorest.csharp repo

Author: hallipr

sdk/core/Azure.Core/src/Shared/FixedDelayWithNoJitterStrategy.cs

@@ -23,4 +23,4 @@ public FixedDelayWithNoJitterStrategy(TimeSpan? suggestedDelay = default) : base
         protected override TimeSpan GetNextDelayCore(Response? response, int retryNumber) =>
             _delay;
     }
-}
+}

sdk/core/Azure.Core/src/Shared/SequentialDelayStrategy.cs

@@ -35,4 +35,4 @@ protected override TimeSpan GetNextDelayCore(Response? response, int retryNumber
             return index >= _pollingSequence.Length ? _maxDelay : _pollingSequence[index];
         }
     }
-}
+}