Merge bitcoin/bitcoin#34858: test: Use NodeClockContext in more tests

faad08e59c test: Use NodeClockContext in more tests (MarcoFalke)
fa8fe0941e fuzz: Use NodeClockContext (MarcoFalke)
fa9f434df8 test: Allow time_point in boost checks (MarcoFalke)

Pull request description:

  Currently mocktime is written to a global, which may leak between sub-tests (albeit some tests try to reset the mocktime on a best-effort basis). Also, when advancing it, one has to keep a counter variable around.

  Fix both issues by using the recently added `NodeClockContext`, which resets the mocktime once it goes out of scope. Also, it has a method to advance the mocktime by a delta.

ACKs for top commit:
  achow101:
    ACK faad08e59c
  seduless:
    Tested ACK faad08e59c
  frankomosh:
    Tested ACK faad08e59c. Ran all relevant tests, all clean. Also verified that the default-constructor call sites in orphanage_tests and addrman_tests behave identically to the explicit `{Now<NodeSeconds>()}` form.
  ryanofsky:
    Code review ACK faad08e59c but had a question about dropping +1 in one test below.

Tree-SHA512: bd56931970eed02bfcf3f3593ef64a61a8a1d8cc8adf190d6903b35df0fd7e6d865678c7d5bd23ce53d074cb2cf53a0a19212fdeb593b047dac5561859bc86b0

src/test/orphanage_tests.cpp

@@ -13,6 +13,7 @@
 #include <test/util/common.h>
 #include <test/util/random.h>
 #include <test/util/setup_common.h>
+#include <test/util/time.h>
 #include <test/util/transaction_utils.h>
 
 #include <array>
@@ -431,9 +432,7 @@ BOOST_AUTO_TEST_CASE(DoS_mapOrphans)
     FillableSigningProvider keystore;
     BOOST_CHECK(keystore.AddKey(key));
 
-    // Freeze time for length of test
-    auto now{GetTime<std::chrono::seconds>()};
-    SetMockTime(now);
+    NodeClockContext clock_ctx{};
 
     std::vector<CTransactionRef> orphans_added;