use property to make interning configurable

backend/src/main/java/com/bakdata/conquery/models/events/stores/primitive/StringStoreString.java

@@ -27,9 +27,20 @@ public static StringStoreString create(int size) {
 
 	@JsonCreator
 	public static StringStoreString withInternedStrings(String[] values) {
+		if(shouldIntern()) {
+			for (int index = 0; index < values.length; index++) {
+				values[index] = values[index] != null ? values[index].intern() : null;
+			}
+		}
+
 		return new StringStoreString(values);
 	}
 
+	private static boolean shouldIntern() {
+		//TODO use mixin or properly wire this property
+		return "yes".equals(System.getProperty("cq.intern", "no"));
+	}
+
 	@Override
 	public boolean has(int event) {
 		return values[event] != null;