test: Use test_bitcoin setup in bench, Add test utils

src/bench/bench_bitcoin.cpp

@@ -6,14 +6,11 @@
 
 #include <crypto/sha256.h>
 #include <key.h>
-#include <util/system.h>
 #include <util/strencodings.h>
-#include <validation.h>
+#include <util/system.h>
 
 #include <memory>
 
-const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
-
 static const int64_t DEFAULT_BENCH_EVALUATIONS = 5;
 static const char* DEFAULT_BENCH_FILTER = ".*";
 static const char* DEFAULT_BENCH_SCALING = "1.0";
@@ -36,14 +33,6 @@ static void SetupBenchArgs()
     gArgs.AddArg("-plot-height=<x>", strprintf("Plot height in pixel (default: %u)", DEFAULT_PLOT_HEIGHT), false, OptionsCategory::OPTIONS);
 }
 
-static fs::path SetDataDir()
-{
-    fs::path ret = fs::temp_directory_path() / "bench_bitcoin" / fs::unique_path();
-    fs::create_directories(ret);
-    gArgs.ForceSetArg("-datadir", ret.string());
-    return ret;
-}
-
 int main(int argc, char** argv)
 {
     SetupBenchArgs();
@@ -59,13 +48,6 @@ int main(int argc, char** argv)
         return EXIT_SUCCESS;
     }
 
-    // Set the datadir after parsing the bench options
-    const fs::path bench_datadir{SetDataDir()};
-
-    SHA256AutoDetect();
-    ECC_Start();
-    SetupEnvironment();
-
     int64_t evaluations = gArgs.GetArg("-evals", DEFAULT_BENCH_EVALUATIONS);
     std::string regex_filter = gArgs.GetArg("-filter", DEFAULT_BENCH_FILTER);
     std::string scaling_str = gArgs.GetArg("-scaling", DEFAULT_BENCH_SCALING);
@@ -88,9 +70,5 @@ int main(int argc, char** argv)
 
     benchmark::BenchRunner::RunAll(*printer, evaluations, scaling_factor, regex_filter, is_list_only);
 
-    fs::remove_all(bench_datadir);
-
-    ECC_Stop();
-
     return EXIT_SUCCESS;
 }