Add mappings mechanism to take original constants variables names so that we dont need to refactor everything

Author: anna-git

tracer/src/Datadog.Trace.SourceGenerators/Configuration/ConfigurationKeysGenerator.cs

@@ -44,4 +44,5 @@ internal class TrackingNames
     public const string ConfigurationKeysGenMatcherValidData = nameof(ConfigurationKeysGenMatcherValidData);
     public const string ConfigurationKeysGenAdditionalText = nameof(ConfigurationKeysGenAdditionalText);
     public const string ConfigurationKeysGenYamlAdditionalText = nameof(ConfigurationKeysGenYamlAdditionalText);
+    public const string ConfigurationKeysGenMappingAdditionalText = nameof(ConfigurationKeysGenMappingAdditionalText);
 }

tracer/src/Datadog.Trace.SourceGenerators/Helpers/TrackingNames.cs

@@ -14,6 +14,9 @@ namespace Datadog.Trace.Configuration
     /// </summary>
     internal static partial class ConfigurationKeys
     {
+        // temporary so that ConfigurationKeys2 can resolve reference, all this is removed later
+        public const string TraceLogPath = "DD_TRACE_LOG_PATH";
+
         /// <summary>
         /// Configuration key to enable experimental features.
         /// </summary>
@@ -967,7 +970,7 @@ internal static class DataStreamsMonitoring
             /// Configuration key for enabling legacy binary headers in Data Streams Monitoring.
             /// false by default if DSM is in default state, true otherwise
             /// </summary>
-             /// <see cref="TracerSettings.IsDataStreamsLegacyHeadersEnabled"/>
+            /// <see cref="TracerSettings.IsDataStreamsLegacyHeadersEnabled"/>
             public const string LegacyHeadersEnabled = "DD_DATA_STREAMS_LEGACY_HEADERS";
         }
     }