Do not wait for status to become available if it is already available…

…. This waited 30 seconds even if the status was already available. Fixes #30402.

internal/service/elasticache/replication_group.go

@@ -620,9 +620,11 @@ func resourceReplicationGroupRead(ctx context.Context, d *schema.ResourceData, m
 	// Tags cannot be read when the replication group is not Available
 	log.Printf("[DEBUG] Waiting for ElastiCache Replication Group (%s) to become available", d.Id())
 
-	_, err = WaitReplicationGroupAvailable(ctx, conn, d.Id(), d.Timeout(schema.TimeoutUpdate))
-	if err != nil {
-		return sdkdiag.AppendErrorf(diags, "waiting for ElastiCache Replication Group to be available (%s): %s", aws.StringValue(rgp.ARN), err)
+	if aws.StringValue(rgp.Status) != "available" {
+		_, err = WaitReplicationGroupAvailable(ctx, conn, d.Id(), d.Timeout(schema.TimeoutUpdate))
+		if err != nil {
+			return sdkdiag.AppendErrorf(diags, "waiting for ElastiCache Replication Group to be available (%s): %s", aws.StringValue(rgp.ARN), err)
+		}
 	}
 
 	log.Printf("[DEBUG] ElastiCache Replication Group (%s): Checking underlying cache clusters", d.Id())