Merge #15327: tests: Make test updatecoins_simulation_test deterministic

ef0b01217a tests: Make updatecoins_simulation_test deterministic (practicalswift)

Pull request description:

  Make test `updatecoins_simulation_test` deterministic.

  Can be verified using `contrib/test_deterministic_coverage.sh` introduced in #15296.

  Related:
  * #15296: "tests: Add script checking for deterministic line coverage in unit tests"
  * #15324: "test: Make bloom tests deterministic"
  * #14343: "coverage reports non-deterministic"

Tree-SHA512: 3466e28a42dd3735effb8542044d88e8350a470729d4a4f02abce9d6367de6568d698131469ba154d3dc76d448bacb360b7aefd066bb5b91408c0be375dd3ecb

src/test/coins_tests.cpp

@@ -279,6 +279,8 @@ UtxoData::iterator FindRandomFrom(const std::set<COutPoint> &utxoSet) {
 // has the expected effect (the other duplicate is overwritten at all cache levels)
 BOOST_AUTO_TEST_CASE(updatecoins_simulation_test)
 {
+    SeedInsecureRand(/* deterministic */ true);
+
     bool spent_a_duplicate_coinbase = false;
     // A simple map to track what we expect the cache stack to represent.
     std::map<COutPoint, Coin> result;