CI: make Clippy reuse build artifacts, other cleanup (#5357)

* CI: move clippy after build so it can reuse build artifacts

* CI: Remove unused rustfmt+clippy from venv

.github/workflows/ci.yml

@@ -45,23 +45,23 @@ jobs:
           command: fmt
           args: --all -- --check
 
-      - name: Clippy
-        uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: --all ${{ matrix.flags }} -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect
-
       - name: Build Nushell
         uses: actions-rs/cargo@v1
         with:
           command: build
-          args: ${{ matrix.flags }}
+          args: --workspace ${{ matrix.flags }}
+
+      - name: Clippy
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --workspace ${{ matrix.flags }} -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect
 
       - name: Tests
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --all ${{ matrix.flags }}
+          args: --workspace ${{ matrix.flags }}
 
 
   python-virtualenv:
@@ -85,7 +85,6 @@ jobs:
           profile: minimal
           toolchain: ${{ matrix.rust }}
           override: true
-          components: rustfmt, clippy
 
       - uses: Swatinem/rust-cache@v1
         with: