New: Handle multi title release names split by slash

Closes #7917

Co-Authored-By: andrey4korop <24610708+andrey4korop@users.noreply.github.com>

src/NzbDrone.Core.Test/ParserTests/ParserFixture.cs

@@ -193,6 +193,13 @@ namespace NzbDrone.Core.Test.ParserTests
                 "Return Earth to Normal 'em High",
                 "World 2"
             })]
+        [TestCase("Енола Голмс / Enola Holmes (2020) UHD WEB-DL 2160p 4K HDR H.265 Ukr/Eng | Sub Ukr/Eng",
+            new string[]
+            {
+                "Енола Голмс / Enola Holmes",
+                "Енола Голмс",
+                "Enola Holmes"
+            })]
         public void should_parse_movie_alternative_titles(string postTitle, string[] parsedTitles)
         {
             var movieInfo = Parser.Parser.ParseMovieTitle(postTitle, true);

src/NzbDrone.Core/Parser/Parser.cs

@@ -100,7 +100,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex ReversedTitleRegex = new Regex(@"(?:^|[-._ ])(p027|p0801)[-._ ]", RegexOptions.Compiled);
 
         // Regex to split movie titles that contain `AKA`.
-        private static readonly Regex AlternativeTitleRegex = new Regex(@"[ ]+AKA[ ]+", RegexOptions.IgnoreCase | RegexOptions.Compiled);
+        private static readonly Regex AlternativeTitleRegex = new Regex(@"[ ]+(?:AKA|\/)[ ]+", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         // Regex to unbracket alternative titles.
         private static readonly Regex BracketedAlternativeTitleRegex = new Regex(@"(.*) \([ ]*AKA[ ]+(.*)\)", RegexOptions.IgnoreCase | RegexOptions.Compiled);