core: redo search cache from scratch. resolves #10382 (#10447)

In simple words, when you make a request in Jackett, the results are saved in memory (cache). The next request will return results form the cache improving response time and making fewer requests to the sites.
* We assume all indexers/sites are stateless, the same request return the same response. If you change the search term, categories or something in the query Jackett has to make a live request to the indexer.
* There are some situations when we don't want to use the cache:
** When we are testing the indexers => if query.IsTest results are not cached
** When the user updates the configuration of one indexer => We call CleanIndexerCache to remove cached results before testing the configuration
** When there is some error/exception in the indexer => The results are not cached so we can retry in the next request
* We want to limit the memory usage, so we try to remove elements from cache ASAP:
** Each indexer can have a maximum number of results in memory. If the limit is exceeded we remove old results
** Cached results expire after some time
* Users can configure the cache or even disable it

src/Jackett.Test/Common/Indexers/CardigannIndexerTests.cs

@@ -25,7 +25,7 @@ namespace Jackett.Test.Common.Indexers
                 },
                 Search = new searchBlock()
             };
-            var indexer = new CardigannIndexer(null, null, null, null, definition);
+            var indexer = new CardigannIndexer(null, null, null, null, null, definition);
 
             Assert.True(indexer.TorznabCaps.SearchAvailable);
             Assert.IsEmpty(indexer.TorznabCaps.TvSearchParams);
@@ -90,7 +90,7 @@ namespace Jackett.Test.Common.Indexers
                 },
                 Search = new searchBlock()
             };
-            indexer = new CardigannIndexer(null, null, null, null, definition);
+            indexer = new CardigannIndexer(null, null, null, null, null, definition);
 
             // test categories
             var expected = new List<TorznabCategory>
@@ -125,7 +125,7 @@ namespace Jackett.Test.Common.Indexers
                 },
                 Search = new searchBlock()
             };
-            indexer = new CardigannIndexer(null, null, null, null, definition);
+            indexer = new CardigannIndexer(null, null, null, null, null, definition);
 
             Assert.True(indexer.TorznabCaps.SearchAvailable);
             Assert.AreEqual(

src/Jackett.Test/Common/Models/ResultPageTests.cs

@@ -20,7 +20,8 @@ namespace Jackett.Test.Common.Models
                    configService: null,
                    logger: null,
                    configData: null,
-                   p: null)
+                   p: null,
+                   cs: null)
         {
         }
 

src/Jackett.Test/TestHelpers/TestWebIndexer.cs

@@ -21,7 +21,8 @@ namespace Jackett.Test.TestHelpers
                  configService: null,
                  logger: null,
                  configData: new ConfigurationData(),
-                 p: null)
+                 p: null,
+                 cacheService: null)
         {
             Encoding = Encoding.UTF8;
             Language = "en-us";