hyperopt-list --export-csv command stake currency fix

Take stake currency from hyperopt result file instead of config

freqtrade/optimize/hyperopt_tools.py

@@ -374,7 +374,6 @@ class HyperoptTools:
 
         trials = json_normalize(results, max_level=1)
         trials["Best"] = ""
-        trials["Stake currency"] = config["stake_currency"]
 
         base_metrics = [
             "Best",
@@ -383,7 +382,7 @@ class HyperoptTools:
             "results_metrics.profit_mean",
             "results_metrics.profit_median",
             "results_metrics.profit_total",
-            "Stake currency",
+            "results_metrics.stake_currency",
             "results_metrics.profit_total_abs",
             "results_metrics.holding_avg",
             "results_metrics.trade_count_long",

tests/commands/test_commands.py

@@ -1532,8 +1532,9 @@ def test_hyperopt_list(mocker, capsys, caplog, tmp_path):
     assert csv_file.is_file()
     line = csv_file.read_text()
     assert (
-        'Best,1,2,-1.25%,-1.2222,-0.00125625,,-2.51,"3,930.0 m",-0.00125625,23.00%,0.43662' in line
-        or "Best,1,2,-1.25%,-1.2222,-0.00125625,,-2.51,2 days 17:30:00,2,0,-0.00125625,23.00%,"
+        'Best,1,2,-1.25%,-1.2222,-0.00125625,BTC,-2.51,"3,930.0 m",-0.00125625,23.00%,0.43662'
+        in line
+        or "Best,1,2,-1.25%,-1.2222,-0.00125625,BTC,-2.51,2 days 17:30:00,2,0,-0.00125625,23.00%,"
         "0.43662"
         in line
     )