[API] Extend times API (#9200)

Extensively extend the times API.

close #8833; close #8513; close #8559

models/fixtures/tracked_time.yml

@@ -4,6 +4,7 @@
   issue_id: 1
   time: 400
   created_unix: 946684800
+  deleted: false
 
 -
   id: 2
@@ -11,6 +12,7 @@
   issue_id: 2
   time: 3661
   created_unix: 946684801
+  deleted: false
 
 -
   id: 3
@@ -18,17 +20,52 @@
   issue_id: 2
   time: 1
   created_unix: 946684802
+  deleted: false
 
 -
   id: 4
   user_id: -1
   issue_id: 4
   time: 1
-  created_unix: 946684802
+  created_unix: 946684803
+  deleted: false
 
 -
   id: 5
   user_id: 2
   issue_id: 5
   time: 1
-  created_unix: 946684802
+  created_unix: 946684804
+  deleted: false
+
+-
+  id: 6
+  user_id: 1
+  issue_id: 2
+  time: 20
+  created_unix: 946684812
+  deleted: false
+
+-
+  id: 7
+  user_id: 2
+  issue_id: 4
+  time: 3
+  created_unix: 946684813
+  deleted: false
+
+-
+  id: 8
+  user_id: 1
+  issue_id: 4
+  time: 71
+  created_unix: 947688814
+  deleted: false
+
+-
+  id: 9
+  user_id: 2
+  issue_id: 2
+  time: 100000
+  created_unix: 947688815
+  deleted: true