chore(CI): run clippy (#2181)

Author: rishav-karanjit

.github/workflows/library_rust_tests.yml

@@ -65,7 +65,7 @@ jobs:
       - name: Setup Rust Toolchain for GitHub CI
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          components: rustfmt
+          components: rustfmt, clippy
 
       - name: Setup Dafny
         uses: ./submodules/MaterialProviders/.github/actions/setup_dafny/
@@ -148,3 +148,11 @@ jobs:
         run: |
           cargo run --release --example main
           cargo test --release --example main
+
+      - name: Run clippy
+        if: ${{ matrix.library == 'DynamoDbEncryption' }}
+        working-directory: ${{ matrix.library }}/runtimes/rust
+        shell: bash
+        run: |
+          cargo clippy
+          cargo clippy --example main