fix: allow "Debug" and "Release" configuration for upload symbol script

packages/flutterfire_cli/lib/src/commands/upload_symbols.dart

@@ -349,6 +349,18 @@ class UploadCrashlyticsSymbols extends FlutterFireCommand {
     );
     final appIdFilePath =
         await _findOrCreateAppIdFile(appIdFileDirectory, appId, projectId);
+
+    final appFrameworkDsymPath = path.join(
+      envBuildProductsDir,
+      'App.framework.dSYM',
+    );
+
+    final buildDirectory = Directory(appFrameworkDsymPath);
+
+    // Set configuration to "Release" if "App.framework.dSYM" exists. Otherwise, "Debug". This is to ensure successful upload of symbols
+    final buildConfiguration =
+        buildDirectory.existsSync() ? 'Release' : 'Debug';
+
     // Validation script
     final validationScript = await Process.run(
       uploadSymbolsScriptPath,
@@ -359,8 +371,7 @@ class UploadCrashlyticsSymbols extends FlutterFireCommand {
       ],
       environment: {
         'PLATFORM_NAME': envPlatformName,
-        // Hard code "Release" to ensure "App.framework.dsym" is uploaded and complies with upload-symbol script
-        'CONFIGURATION': 'Release',
+        'CONFIGURATION': buildConfiguration,
         'PROJECT_DIR': envProjectDir,
         'DWARF_DSYM_FOLDER_PATH': envDwarfDsymFolderPath,
         'DWARF_DSYM_FILE_NAME': envDwarfDsymFileName,
@@ -372,6 +383,7 @@ class UploadCrashlyticsSymbols extends FlutterFireCommand {
     if (validationScript.exitCode != 0) {
       throw Exception(validationScript.stderr);
     }
+
     // Upload script
     final uploadScript = await Process.run(
       uploadSymbolsScriptPath,
@@ -381,8 +393,7 @@ class UploadCrashlyticsSymbols extends FlutterFireCommand {
       ],
       environment: {
         'PLATFORM_NAME': envPlatformName,
-        // Hard code "Release" to ensure "App.framework.dsym" is uploaded and complies with upload-symbol script
-        'CONFIGURATION': 'Release',
+        'CONFIGURATION': buildConfiguration,
         'PROJECT_DIR': envProjectDir,
         'DWARF_DSYM_FOLDER_PATH': envDwarfDsymFolderPath,
         'DWARF_DSYM_FILE_NAME': envDwarfDsymFileName,