Merge bitcoin/bitcoin#25101: Add mockable clock type

fa305fd92c Add mockable clock type and TicksSinceEpoch helper (MarcoFalke)

Pull request description:

  This will be used primarily by the addr time refactor (https://github.com/bitcoin/bitcoin/pull/24697) to make addr relay time type safe. However, it can also be used in other places, and can be reviewed independently, so I split it up.

ACKs for top commit:
  jonatack:
    ACK fa305fd92c per `git range-diff 7b3343f fa20781 fa305fd`
  ajtowns:
    ACK fa305fd92c

Tree-SHA512: da00200126833c1f55b1b1e68f596eab5c9254e82b188ad17779c08ffd685e198a7c5270791b4b69a858dc6ba4e051fe0c8b445d203d356d0c884f6365ee1cfe

src/bitcoin-cli.cpp

@@ -44,7 +44,6 @@
 // trivial to get the mocked time from the server, nor is it needed for now, so
 // just use a plain system_clock.
 using CliClock = std::chrono::system_clock;
-using CliSeconds = std::chrono::time_point<CliClock, std::chrono::seconds>;
 
 const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
 UrlDecodeFn* const URL_DECODE = urlDecode;
@@ -470,7 +469,7 @@ public:
         if (networkinfo["version"].getInt<int>() < 209900) {
             throw std::runtime_error("-netinfo requires bitcoind server to be running v0.21.0 and up");
         }
-        const int64_t time_now{count_seconds(Now<CliSeconds>())};
+        const int64_t time_now{TicksSinceEpoch<std::chrono::seconds>(CliClock::now())};
 
         // Count peer connection totals, and if DetailsRequested(), store peer data in a vector of structs.
         for (const UniValue& peer : batch[ID_PEERINFO]["result"].getValues()) {