Add generic coverage task (#763)

**Todo:**
- [x] Finalize format for coverage file(s)
- [x] Add service support
- [x] Integration test
- [x] Merge #926 
- [x] Merge #929

src/cli/onefuzz/api.py

@@ -850,6 +850,7 @@ class Tasks(Endpoint):
         colocate: bool = False,
         report_list: Optional[List[str]] = None,
         minimized_stack_depth: Optional[int] = None,
+        coverage_filter: Optional[str] = None,
     ) -> models.Task:
         """
         Create a task
@@ -915,6 +916,7 @@ class Tasks(Endpoint):
                 report_list=report_list,
                 preserve_existing_outputs=preserve_existing_outputs,
                 minimized_stack_depth=minimized_stack_depth,
+                coverage_filter=coverage_filter,
             ),
         )