Add a feature flag since the feature might not be complete during one release cycle.

Author: jaclync

Experiments/Experiments/DefaultFeatureFlagService.swift

@@ -35,6 +35,8 @@ public struct DefaultFeatureFlagService: FeatureFlagService {
             return true
         case .storeWidgets:
             return buildConfig == .localDeveloper || buildConfig == .alpha
+        case .searchProductsBySKU:
+            return buildConfig == .localDeveloper || buildConfig == .alpha
         default:
             return true
         }

Experiments/Experiments/FeatureFlag.swift

@@ -73,4 +73,8 @@ public enum FeatureFlag: Int {
     /// Enables home screen store widgets.
     ///
     case storeWidgets
+
+    /// Enables searching products by partial SKU for WC version 6.6+.
+    ///
+    case searchProductsBySKU
 }