ClientForwardRefs test clients not in fixture and tests not working

[bombsimon]

The test test_main_generates_correct_package in tests/main/test_main.py requires manual adding of clients to be tested. This seems to have been forgotten when ClientForwardRefs was added.

I tried to just blindly add it to the fixture but this actually seems to uncover a bug where relative paths aren't resolved properly. With the following diff:

diff --git a/tests/main/test_main.py b/tests/main/test_main.py
index 3cf9f1d..84da31d 100644
--- a/tests/main/test_main.py
+++ b/tests/main/test_main.py
@@ -213,6 +213,30 @@ def test_main_shows_version():
             "example_client",
             CLIENTS_PATH / "custom_sync_query_builder" / "expected_client",
         ),
+        (
+            (
+                CLIENTS_PATH / "client_forward_refs" / "pyproject.toml",
+                (
+                    CLIENTS_PATH / "client_forward_refs" / "queries.graphql",
+                    CLIENTS_PATH / "client_forward_refs" / "schema.graphql",
+                    CLIENTS_PATH / "client_forward_refs" / "custom_scalars.py",
+                ),
+            ),
+            "client_forward_refs",
+            CLIENTS_PATH / "client_forward_refs" / "expected_client",
+        ),
+        (
+            (
+                CLIENTS_PATH / "client_forward_refs_shorter_results" / "pyproject.toml",
+                (
+                    CLIENTS_PATH / "client_forward_refs_shorter_results" / "queries.graphql",
+                    CLIENTS_PATH / "client_forward_refs_shorter_results" / "schema.graphql",
+                    CLIENTS_PATH / "client_forward_refs_shorter_results" / "custom_scalars.py",
+                ),
+            ),
+            "client_forward_refs_shorter_results",
+            CLIENTS_PATH / "client_forward_refs_shorter_results" / "expected_client",
+        ),
     ],
     indirect=["project_dir"],
 )

The result is as follows:

› pytest ./tests/main -k test_main_generates_correct_package -vv
[...]
test_main.py::test_main_generates_correct_package[project_dir14-client_forward_refs-expected_package_path14] FAILED        [ 93%]
test_main.py::test_main_generates_correct_package[project_dir15-client_forward_refs_shorter_results-expected_package_path15] FAILED [100%]

[...]
E           AssertionError: client.py
E           assert 'from typing ...ap_fragment\n' == 'from typing ...ap_fragment\n'
E
E             - from typing import TYPE_CHECKING, Any, AsyncIterator, Dict, List, Optional, Union
E             ?                    ---------------
E             + from typing import Any, AsyncIterator, Dict, List, Optional, Union
E
E               from .async_base_client import AsyncBaseClient
E             + from .typing import TYPE_CHECKING...
E
E             ...Full output truncated (351 lines hidden), use '-vv' to show

[...]

        async def list_strings_1(self, **kwargs: Any) -> Optional[List[Optional[str]]]:
  -         from .list_strings_1 import ListStrings1
  +         from ..list_strings_1 import ListStrings1
  ?              +

[...]

/home/xxx/ariadne-codegen/tests/main/test_main.py:49: AssertionError