fix(clippy): fix module_inception and allow lint (#557)

- Fix cortex-storage/sessions/tests.rs module inception issue
- Add module_inception = allow to workspace lints

Author: echobt

Cargo.toml

@@ -393,6 +393,8 @@ print_stderr = "allow"
 unnecessary_sort_by = "allow"
 # Allow iter() without IntoIterator implementation
 iter_without_into_iter = "allow"
+# Allow modules with the same name as parent (test modules pattern)
+module_inception = "allow"
 
 [profile.release]
 lto = "fat"