Adding a method to loadflow provider for parameters update (powsybl#3288)

* Adding a method to loadflow provider for parameters update
* Adding parameter to config to select which default parameters loader to use
* Change place of config parameter + doc

Signed-off-by: Hugo KULESZA <hugo.kulesza@rte-france.com>

Author: HugoKulesza

loadflow/loadflow-api/src/test/java/com/powsybl/loadflow/LoadFlowDefaultParametersLoaderTest.java

@@ -12,6 +12,7 @@
 import com.powsybl.commons.PowsyblException;
 import com.powsybl.commons.config.InMemoryPlatformConfig;
 import com.powsybl.commons.config.MapModuleConfig;
+import com.powsybl.commons.config.PlatformConfig;
 import com.powsybl.commons.extensions.Extension;
 import com.powsybl.loadflow.json.JsonLoadFlowParametersTest;
 import org.junit.jupiter.api.BeforeEach;
@@ -73,7 +74,7 @@ void testCorrectLoadingOrder() {
 
         LoadFlowDefaultParametersLoaderMock loader = new LoadFlowDefaultParametersLoaderMock("test");
 
-        LoadFlowParameters parameters = new LoadFlowParameters(List.of(loader));
+        LoadFlowParameters parameters = new LoadFlowParameters(List.of(loader), PlatformConfig.defaultConfig());
         load(parameters, platformConfig);
         assertFalse(parameters.isUseReactiveLimits());
         assertEquals(LoadFlowParameters.VoltageInitMode.PREVIOUS_VALUES, parameters.getVoltageInitMode());