refact: move fs_files to raw_datas

tests/datastore/fs_files/username.csv

@@ -1,7 +0,0 @@
-Username;Identifier;First name;Last name
-booker12;9012;Rachel;Booker
-grey07;2070;Laura;Grey
-johnson81;4081;Craig;Johnson
-jenkins46;9346;Mary;Jenkins
-smith79;5079;Jamie;Smith
-

tests/datastore/test_fs_datacatalogue.py

@@ -5,7 +5,7 @@ import pytest
 
 from plesna.datastore.fs_datacatalogue import FSDataCatalogue
 
-FIXTURE_DIR = Path(__file__).parent / Path("./fs_files/")
+FIXTURE_DIR = Path(__file__).parent.parent / Path("./raw_datas/")
 
 
 @pytest.fixture