feat(source-google-sheets): migrate connector to manifest-only (#62456)

Co-authored-by: Octavia Squidington III <octavia-squidington-iii@users.noreply.github.com>

airbyte-integrations/connectors/source-google-sheets/unit_tests/conftest.py

@@ -2,12 +2,30 @@
 # Copyright (c) 2025 Airbyte, Inc., all rights reserved.
 #
 
+import sys
+from pathlib import Path
+
 import pytest
-from source_google_sheets.models import CellData, GridData, RowData, Sheet, SheetProperties, Spreadsheet, SpreadsheetValues, ValueRange
 
 from airbyte_cdk.models.airbyte_protocol import AirbyteStream, ConfiguredAirbyteStream, DestinationSyncMode, SyncMode
 
 
+pytest_plugins = ["airbyte_cdk.test.utils.manifest_only_fixtures"]
+
+
+def _get_manifest_path() -> Path:
+    source_declarative_manifest_path = Path("/airbyte/integration_code/source_declarative_manifest")
+    if source_declarative_manifest_path.exists():
+        return source_declarative_manifest_path
+    return Path(__file__).parent.parent
+
+
+_SOURCE_FOLDER_PATH = _get_manifest_path()
+_YAML_FILE_PATH = _SOURCE_FOLDER_PATH / "manifest.yaml"
+
+sys.path.append(str(_SOURCE_FOLDER_PATH))  # to allow loading custom components
+
+
 @pytest.fixture
 def invalid_config():
     return {
@@ -21,30 +39,6 @@ def invalid_config():
     }
 
 
-@pytest.fixture
-def spreadsheet():
-    def maker(spreadsheet_id, sheet_name):
-        return Spreadsheet(
-            spreadsheetId=spreadsheet_id,
-            sheets=[
-                Sheet(
-                    data=[GridData(rowData=[RowData(values=[CellData(formattedValue="ID")])])],
-                    properties=SheetProperties(title=sheet_name, gridProperties={"rowCount": 2}),
-                ),
-            ],
-        )
-
-    return maker
-
-
-@pytest.fixture
-def spreadsheet_values():
-    def maker(spreadsheet_id):
-        return SpreadsheetValues(spreadsheetId=spreadsheet_id, valueRanges=[ValueRange(values=[["1"]])])
-
-    return maker
-
-
 @pytest.fixture
 def catalog():
     def maker(*name_schema_pairs):