table: reorganize PIT implementation

Merge pit-{face,in,out}-record.{cpp,hpp} into pit-entry.{cpp,hpp}
and merge pit-iterator.{cpp,hpp} into pit.{cpp,hpp}.

Rename get{In,Out}Record() to find{In,Out}Record(), following the
typical C++ pattern of using the verb "find" for functions that
return iterators.

No functional changes.

Change-Id: I6740dd6cfe92ca477938ab8dc2f6271fd8b6cc26
diff --git a/tests/daemon/fw/retx-suppression.t.cpp b/tests/daemon/fw/retx-suppression.t.cpp
index d662251..98ee12c 100644
--- a/tests/daemon/fw/retx-suppression.t.cpp
+++ b/tests/daemon/fw/retx-suppression.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2022,  Regents of the University of California,
+ * Copyright (c) 2014-2024,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -191,7 +191,7 @@
   pitEntry->insertOrUpdateInRecord(*face1, *interest);
   BOOST_CHECK(rs.decidePerUpstream(*pitEntry, *face2) == RetxSuppressionResult::FORWARD);
   // Assume interest is sent and increment interval
-  rs.incrementIntervalForOutRecord(*pitEntry->getOutRecord(*face2));
+  rs.incrementIntervalForOutRecord(*pitEntry->findOutRecord(*face2));
 
   pitEntry->insertOrUpdateInRecord(*face2, *interest);
   BOOST_CHECK(rs.decidePerUpstream(*pitEntry, *face2) == RetxSuppressionResult::SUPPRESS);