Update MatchClusters.cc (fix: iwyu) (#2155)

This PR applies the include-what-you-use fixes as suggested by
https://github.com/eic/EICrecon/actions/runs/18865551002.
Please merge this PR into the branch `qunib-patch-1`
to resolve failures in PR #2154.

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src/algorithms/reco/MatchClusters.cc

@@ -17,7 +17,9 @@
 #include <podio/ObjectID.h>
 #include <cmath>
 #include <gsl/pointers>
+#include <iterator>
 #include <map>
+#include <utility>
 
 #include "MatchClusters.h"