add getTags public method

* Add `getTags` public method that will return local tags for the current user
* Rename an existing internal `getTags` method used for IAM processing by appending the internal keyword. I chose not to combine these two methods as one may be called without privacy consent while the public one should be guarded for privacy consent.

Author: nan-li

iOS_SDK/OneSignalSDK/OneSignalInAppMessages/UI/OSInAppMessageView.m

@@ -53,7 +53,7 @@ - (instancetype _Nonnull)initWithMessage:(OSInAppMessageInternal *)inAppMessage
 
 - (NSString *)getTagsString {
     NSError *error;
-    NSDictionary<NSString *, NSString*> *tags = [OneSignalUserManagerImpl.sharedInstance getTags];
+    NSDictionary<NSString *, NSString*> *tags = [OneSignalUserManagerImpl.sharedInstance getTagsInternal];
     if (tags == nil || tags.count <= 0 ) {
         [OneSignalLog onesignalLog:ONE_S_LL_VERBOSE message:@"[getTagsString] no tags found for the player"];
         return nil;

iOS_SDK/OneSignalSDK/OneSignalUser/Source/OneSignalUserManagerImpl.swift

@@ -58,6 +58,7 @@ import OneSignalNotifications
     func addTags(_ tags: [String: String])
     func removeTag(_ tag: String)
     func removeTags(_ tags: [String])
+    func getTags() -> [String: String]
     // Email
     func addEmail(_ email: String)
     func removeEmail(_ email: String)
@@ -466,7 +467,7 @@ public class OneSignalUserManagerImpl: NSObject, OneSignalUserManager {
     }
 
     @objc
-    public func getTags() -> [String: String]? {
+    public func getTagsInternal() -> [String: String]? {
         guard let user = _user else {
             return nil
         }
@@ -661,6 +662,13 @@ extension OneSignalUserManagerImpl: OSUser {
         user.removeTags(tags)
     }
 
+    public func getTags() -> [String: String] {
+        guard !OneSignalConfigManager.shouldAwaitAppIdAndLogMissingPrivacyConsent(forMethod: "getTags") else {
+            return [:]
+        }
+        return user.propertiesModel.tags
+    }
+
     public func addEmail(_ email: String) {
         guard !OneSignalConfigManager.shouldAwaitAppIdAndLogMissingPrivacyConsent(forMethod: "addEmail") else {
             return