Fixed Rust CI

Clippy turned warnings into errors, which is not desirable in our case.
Also removed `too_many_arguments` warning as we don't have any other choice than to pass over 7 arguments to functions when building MPI event objects.

Author: dssgabriel

.github/workflows/rust.yml

@@ -34,7 +34,7 @@ jobs:
       run: |
         cd interpol-rs
         cargo fmt -- --check
-        cargo clippy -- -D warnings
+        cargo clippy -- -A clippy::too_many_arguments
 
     - name: Test
       run: |